Bibliographies thématiques / Neutrinole

Sommaire

  1. Articles de revues
  2. Thèses
  3. Livres
  4. Chapitres de livres
  5. Actes de conférences
  6. Rapports d'organisations

Littérature scientifique sur le sujet « Neutrinole »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres

Choisissez une source :

Consultez les listes thématiques d’articles de revues, de livres, de thèses, de rapports de conférences et d’autres sources académiques sur le sujet « Neutrinole ».

À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.

Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.

Articles de revues sur le sujet "Neutrinole"

1

Khatun, Amina, et Fedor Šimkovic. « Effective Majorana Neutrino Mass for ΔL = 2 Neutrino Oscillations ». Symmetry 14, no 7 (5 juillet 2022) : 1383. http://dx.doi.org/10.3390/sym14071383.

Texte intégral
Résumé :
It is well known that the observations of neutrinoless double-beta decay prove the Majorana nature of the neutrino. However, with specific values of Majorana phases, the effective Majorana neutrino mass to be estimated from the observation of neutrinoless double-beta decay experiments is strongly suppressed if the neutrino mass pattern adheres to a normal ordering. In this case, double-beta decay might not be observed even though the neutrino is Majorana in nature. We show if neutrinos oscillate to antineutrinos in their propagation; then, the observation of this oscillation proves that neutrinos are Majorana and will provide a measurement of neutrino masses and Majorana phases.
Styles APA, Harvard, Vancouver, ISO, etc.
2

Lu, Jianlong, Aik Hui Chan et Choo Hiap Oh. « A Phenomenological Model of Effectively Oscillating Massless Neutrinos and Its Implications ». EPJ Web of Conferences 240 (2020) : 02002. http://dx.doi.org/10.1051/epjconf/202024002002.

Texte intégral
Résumé :
We discuss an alternative picture of neutrino oscillation. In this phenomenological model, the flavor-changing phenomena of massless neutrinos arise from scattering processes between neutrinos and four types of undetected spin-0 massive particles pervading throughout the Universe, instead of neutrinos’ own nature. These scattering processes are kinematically similar to Compton scattering. One type of left-handed massless sterile neutrino is needed in order to reproduce the neutrino oscillation modes predicted in the theory of neutrino mixing. Implications of our model include the existence of sterile neu- trinos, the nonconservation of active neutrinos, the possible mismatch among three neutrino mass squared differences ∆m2ij interpreted in the theory of neutrino mixing, the spacetime dependence of neutrino oscillation, and the impossibility of neutrinoless double beta decay. Several important open problems in neutrino physics become trivial or less severe in our model, such as the smallness of neutrino masses, neutrino mass hierarchy, the mechanism responsible for neutrino masses, and the Dirac/Majorana nature of neutrinos.
Styles APA, Harvard, Vancouver, ISO, etc.
3

Faessler, A. « Super-Kamiokande neutrino oscillations and the supersymmetric model ». HNPS Proceedings 9 (11 février 2020) : 14. http://dx.doi.org/10.12681/hnps.2773.

Texte intégral
Résumé :
The standard model predicts a ratio of 2 for the number of atmospheric muon to electron neutrinos, while super-Kamiokande and others measure a much smaller value (1.30±0.02 for super-Kamiokande). Super-Kamiokande is also able to measure roughly the direction and the energy of the neutrinos. The zenith-angle dependence for the muon neutrinos suggests that the muon neutrinos oscillate into a third neutrino species, either into the r neutrino or a sterile neutrino. This finding is inves- tigated within the supersymmetric model. The neutrinos mix with the neutralinos, this meaning the wino, the bino and the two higgsinos. The 7 x 7 mass matrix is calculated on the tree level. One finds that the mass matrix has three linearly dependent rows, which means that two masses are zero. They are identified with the two lightest neutrino masses. The fit of the super-Kamiokande data to oscillations between three neutrinos yields, together with the result of supersymmetry, that the third neutrino mass lies between 2x10^-2 and 10^-1 eV. The two lightest neutrino masses are in supersymmetry on the tree level zero. The averaged electron neutrino mass which is the essential parameter in the neutrinoless double-beta decay is given by {m_ve) ~ m_v3 P_ze < 0.8 x10^-2 eV (95% confidence limit). It is derived from the super-Kamiokande data in this supersymmetric model to be two orders smaller than the best value (1 eV) from the neutrinoless double-beta decay.
Styles APA, Harvard, Vancouver, ISO, etc.
4

BILENKY, S. M. « NEUTRINOS : A BRIEF REVIEW ». Modern Physics Letters A 19, no 33 (30 octobre 2004) : 2451–77. http://dx.doi.org/10.1142/s0217732304015944.

Texte intégral
Résumé :
The major steps in the development of our knowledge about neutrinos are reviewed. The basics of neutrino oscillation formalism is presented. Neutrino oscillations in the framework of three-neutrino mixing are considered. The evidence for neutrino oscillations is discussed. Neutrinoless double β-decay is briefly considered.
Styles APA, Harvard, Vancouver, ISO, etc.
5

Giunti, Carlo, et Thierry Lasserre. « eV-Scale Sterile Neutrinos ». Annual Review of Nuclear and Particle Science 69, no 1 (19 octobre 2019) : 163–90. http://dx.doi.org/10.1146/annurev-nucl-101918-023755.

Texte intégral
Résumé :
We address the phenomenology of light sterile neutrinos, with an emphasis on short-baseline neutrino oscillations. After reviewing the observed short-baseline neutrino oscillation anomalies, we discuss the global fit of the data and the current appearance–disappearance tension. We also review briefly the effects of light sterile neutrinos in β decay, neutrinoless double-β decay, and cosmology. Finally, we discuss future perspectives of the search for the effects of eV-scale sterile neutrinos.
Styles APA, Harvard, Vancouver, ISO, etc.
6

Verma, Rishu, Monal Kashav, Ankush B, Gazal Sharma, Surender Verma et B. C. Chauhan. « Texture One Zero Model Based on A4 Flavor Symmetry and its Implications to Neutrinoless Double Beta Decay ». Journal of Nuclear Physics, Material Sciences, Radiation and Applications 9, no 1 (31 août 2021) : 67–71. http://dx.doi.org/10.15415/jnp.2021.91012.

Texte intégral
Résumé :
Neutrinos are perhaps the most elusive particles in our Universe. Neutrino physics could be counted as a benchmark for various new theories in elementary particle physics and also for the better understanding of the evolution of the Universe. To complete the neutrino picture, the missing information whether it is about their mass or their nature that the neutrinos are Majorana particles could be provided by the observation of a process called neutrinoless double beta (0νββ) decay. Neutrinoless double beta decay is a hypothesised nuclear process in which two neutrons simultaneously decay into protons with no neutrino emission. In this paper we proposed a neutrino mass model based on A4 symmetry group and studied its implications to 0νββ decay. We obtained a lower limit on |Mee| for inverted hierarchy and which can be probed in 0νββ experiments like SuperNEMO and KamLAND-Zen.
Styles APA, Harvard, Vancouver, ISO, etc.
7

Francis, Ng K., et Ankur Nath. « The Effects of Majorana Phases in Estimating the Masses of Neutrinos ». International Journal of Modern Physics : Conference Series 47 (janvier 2018) : 1860100. http://dx.doi.org/10.1142/s201019451860100x.

Texte intégral
Résumé :
Majorana CP violating phases coming from heavy right-handed Majorana mass matrices([Formula: see text]) are considered to estimate the masses of neutrinos. The effects of phases on quasi-degenerate neutrinos mass matrix obeying [Formula: see text] symmetry predicts the results consistent with observations for (i) solar mixing angle([Formula: see text]) below TBM, (ii) absolute neutrino mass parameters[[Formula: see text]] in neutrinoless double beta([Formula: see text]) decay, and (iii) cosmological upper bound [Formula: see text]. Analysis is carried out through parameterization of light left-handed Majorana neutrino matrices ([Formula: see text]) using only two unknown parameters ([Formula: see text]) within [Formula: see text] symmetry. We consider the charge lepton and up quark matrices as diagonal form of Dirac neutrino mass matrix ([Formula: see text]), and [Formula: see text] are generated using [Formula: see text] through inversion of Type-I seesaw formula. The analysis shows that the masses of neutrinos are in agreement with the upper bound from cosmology and neutrinoless double beta decay. The results presented in this article will have important implications in discriminating the neutrinos mass models.
Styles APA, Harvard, Vancouver, ISO, etc.
8

Kudenko, Yury. « New results and perspectives in neutrino physics ». EPJ Web of Conferences 212 (2019) : 01005. http://dx.doi.org/10.1051/epjconf/201921201005.

Texte intégral
Résumé :
A brief review of new results and perspectives in neutrino physics is presented. An emphasis on a search for CP violation in neutrino oscillations and a search for sterile neutrinos is given. Status of measurement of the direct neutrino mass measurement and searches for neutrinoless double beta decay are also discussed.
Styles APA, Harvard, Vancouver, ISO, etc.
9

Petcov, S. T. « The Nature of Massive Neutrinos ». Advances in High Energy Physics 2013 (2013) : 1–20. http://dx.doi.org/10.1155/2013/852987.

Texte intégral
Résumé :
The compelling experimental evidences for oscillations of solar, reactor, atmospheric, and accelerator neutrinos imply the existence of 3-neutrino mixing in the weak charged lepton current. The current data on the 3-neutrino mixing parameters are summarised and the phenomenology of 3-νmixing is reviewed. The properties of massive Majorana neutrinos and of their various possible couplings are discussed in detail. Two models of neutrino mass generation with massive Majorana neutrinos—the type I see-saw and the Higgs triplet model—are briefly reviewed. The problem of determining the nature, Dirac or Majorana, of massive neutrinos is considered. The predictions for the effective Majorana mass|〈m〉|in neutrinoless double-beta-((ββ)0ν-) decay in the case of 3-neutrino mixing and massive Majorana neutrinos are summarised. The physics potential of the experiments, searching for(ββ)0ν-decay for providing information on the type of the neutrino mass spectrum, on the absolute scale of neutrino masses, and on the Majorana CP-violation phases in the PMNS neutrino mixing matrix, is also briefly discussed. The opened questions and the main goals of future research in the field of neutrino physics are outlined.
Styles APA, Harvard, Vancouver, ISO, etc.
10

Okada, Nobuchika, et Osamu Yasuda. « A Sterile Neutrino Scenario Constrained By Experiments and Cosmology ». International Journal of Modern Physics A 12, no 21 (20 août 1997) : 3669–94. http://dx.doi.org/10.1142/s0217751x97001894.

Texte intégral
Résumé :
We analyze a scheme in which three active neutrinos and one sterile neutrino account for the solar, the atmospheric and the LSND neutrino anomalies in a model-independent way. It is shown that if the equivalent number, Nν, of the light neutrino species is less than 4, then the constraints from these anomalies, accelerator and reactor experiments and big bang nucleosynthesis force a general 4 × 4 mixing matrix to be effectively split into two 2 × 2 matrices. If these neutrinos are of the Majorana type, then negative results of neutrinoless double beta decay experiments imply that the total mass of neutrinos is not sufficient to account for all the hot dark matter components.
Styles APA, Harvard, Vancouver, ISO, etc.
Plus de sources

Thèses sur le sujet "Neutrinole"

1

POZZI, STEFANO. « Search for double-beta decay of 130Te to the excited states of 130Xe in CUORE-0 ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2017. http://hdl.handle.net/10281/158137.

Texte intégral
Résumé :
CUORE-0 è stato un esperimento bolometrico, mantenuto in funzione dal 2013 al 2015, il cui scopo scientifico principale è stata la ricerca del decadimento doppio beta senza emissione di neutrini (0vbb) nel 130Te. Il rivelatore era costituito da 52 cristalli di TeO2, usati sia come rivelatore che come sorgente dell'isotopo di interesse. I cristalli erano organizzati in una singola torre e contenuti in un criostato capace di raggiungere la temperatura di 10 mK. Grazie al basso fondo radioattivo raggiunto dall'esperimento, la ricerca di altri processi rari, oltre al decadimento doppio beta senza emissione di neutrini, è stata possibile. In questa tesi descrivo i metodi che ho usato per la ricerca del decadimento doppio beta del 130Te sugli stati eccitati del 130Xe. Questo decadimento è caratterizzato dall'emissione di due elettroni, seguiti da una cascata di fotoni, dandogli una segnatura chiaramente identificabile. Ho studiato due processi distinti, il decadimento con l'emissione di due neutrino, permesso dal Modello Standard, e il decadimento senza emissione di neutrini. Per poter identificare chiaramente la segnatura di questi decadimenti è stato necessario ottimizzare una procedura di analisi dedicata, che ha richiesto l'uso sia di dati reali che simulati. I due decadimenti non sono stati osservati in CUORE-0, ma è stato possibile dare un limite inferiore al relativo tempo di dimezzamento: per il decadimento senza emissione di neutrini T1/2 > 5.44x10^23 anni, mentre per il decadimento con l'emissione di due neutrini T1/2 > 1.85x10^23 anni. In particolare, il risultato per il canale con l'emissione di due neutrini rappresenta un netto miglioramento rispetto al limite preesistente, determinato dall'esperimento Cuoricino e pari a 1.30x10^23 anni. La combinazione dei risultati di CUORE-0 e Cuoricino permette di raggiungere limiti ancora migliori: T1/2 > 1.48x10^24 anni per il decadimento senza neutrini e T1/2 > 2.19x10^23 anni per il decadimento con due neutrini. Questi risultati rappresentano i limiti più stringenti disponibili al momento per entrambi i processi.
CUORE-0 was a bolometric experiment, operated between 2013 and 2015, whose main scientific goal was the search for neutrinoless double-beta decay (0vbb) in 130Te. The detector consisted of 52 TeO2 crystals, used both as a detector and a source for the isotope under investigation. The crystals were arranged in a single tower and contained in a cryostat capable of reaching the temperature of 10 mK. Thanks to the low background of the experiment, searches for rare events other than 0vbb are possible. In this thesis I describe the methods used to search for double-beta decay of 130Te on the excited states of 130Xe. This decay is characterized by the emission of two electrons followed by a photon cascade, giving it a very characteristic signature. I studied two distinct processes, the SM-allowed two neutrino double-beta decay and neutrinoless double-beta decay on the excited states. In order to properly detect the signatures of these decays a dedicated optimization of the analysis procedure, involving both real and simulated data, was required. The two decays are not observed in CUORE-0, but a lower limit on the half-life of both processes can be set: for the neutrinoless decay, T1/2 > 5.44x10^23 yr, and for the two neutrino decay T1/2 > 1.85x10^23. The result from the two neutrino channel from CUORE-0 was a clear improvement over the previously existing half-life limit, set by the Cuoricino experiment at 1.30x#10^23 years. The combination of the results from CUORE-0 and Cuoricino yields even better limits: T1/2 > 1.48x10^24 years for the neutrinoless channel and T1/2 > 2.19x10^23 for the two neutrino channel. These results represent the most stringent limits currently available for both processes.
Styles APA, Harvard, Vancouver, ISO, etc.
2

Wong, Chan Fai. « Phenomenology of sterile neutrinos at different mass scales : neutrinoless double beta decay and neutrino oscillations ». Thesis, Durham University, 2012. http://etheses.dur.ac.uk/4931/.

Texte intégral
Résumé :
The existence of neutrino oscillation is the first evidence of physics beyond the Standard Model. It proves that neutrinos are massive and motivates the study of the neutrino nature, mixings and mass generation models. To have a better understanding of neutrino masses and mixings, the existence and character of sterile neutrinos would be an important factor. In this thesis, we will describe the phenomena of neutrinoless double beta decay and sterile neutrino oscillations. The studies of these two topics will contribute to understanding the properties of sterile neutrinos in the heavy and light mass regime. We first study the neutrinoless double beta decay process to tackle the issue about the nature of neutrino. Establishing the nature of neutrinos, whether they are Dirac or Majorana particles is one of the fundamental questions we need to answer in particle physics, and is related to the conservation of lepton number. Neutrinoless double beta decay is the tool of choice for testing the Majorana nature of neutrinos. However, up to now, this process has not been observed, but a wide experimental effort is taking place worldwide and soon new results will become available. Different mechanisms can induce neutrinoless double beta decay and might interfere with each other, potentially leading to suppressed contributions to the decay rate. This possibility would become of great interest if upcoming neutrino mass measurements from KATRIN and cosmological observations found that neutrino mass is larger than 0.2 eV but no positive signal was observed in neutrinoless double beta decay experiments. We focus on the possible interference between light Majorana neutrino exchange with other mechanisms, such as heavy sterile neutrinos and R-parity violating supersymmetric models. We show that in some cases the use of different nuclei would allow to disentangle the different contributions and allow to test the hypothesis of destructive interference. Finally, we present a model in which such interference can emerge and we discuss the range of parameters which would lead to a significant suppression of the decay rate. Heavy sterile neutrino is involved in the studies of neutrinoless double beta decay and mass generation involve. On the other hand, the effect of light sterile neutrino may be present in the oscillation experiments. To measure the light sterile neutrino mixing, high statistics measurements are necessary. A neutrino factory has been suggested as a powerful tool for studying new physics, for example, sterile neutrinos, exploiting its near detectors. Here, we use the new version of GLoBES to study the potential of a low energy neutrino factory (LENF) in constraining the sterile mixing angles and the mass-square difference. Unlike in conventional long baseline neutrino experiments, the electron neutrino disappearance and appearance channels are also included, since they have been proved helpful in constraining some of the mixing angles. We will explore the dependence of the performance of the LENF depending on different experimental setups, such as the detector type (TASD and LiAr), the energy range, the systematic errors. etc. Moreover, the re-analysis of reactor neutrino experiments suggests the presence of neutrino oscillations due to large sterile neutrino mixing with electron neutrino. We show that, with a near detector, LENF can constrain the sterile parameter values in a very small range and helps us to check the recent Reactor Anomaly.
Styles APA, Harvard, Vancouver, ISO, etc.
3

Gratieri, Diego Rossi 1982. « Fenomenologia de neutrinos atmosféricos com neutrinos de massa variável ». [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278535.

Texte intégral
Résumé :
Orientador: Orlando Luis Goulart Peres
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
Made available in DSpace on 2018-08-20T17:03:07Z (GMT). No. of bitstreams: 1 Gratieri_DiegoRossi_D.pdf: 1179296 bytes, checksum: 9a313c3efcf6512bd55d97d0b99d491b (MD5) Previous issue date: 2012
Resumo: Neste trabalho obtemos de forma independente a descrição da distribuição angular dos eventos de neutrinos atmosféricos vistos pelo detector Super-Kamiokande tanto para as regiões de sub-GeV como multi-GeV. Para tal, estudamos de forma detalhada a seção de choque neutrinonucleon para processos de espalhamento via corrente carregada para todo o intervalo de energia pelo qual o fluxo de neutrinos atmosféricos se estende. Integramos então o produto do fluxo de neutrinos atmosféricos pela seção de choque de detecção dos neutrinos e pela probabilidade de oscilação padrão de neutrinos atmosféricos e obtemos a distribuição angular de eventos em Super-Kamiokande. Através de análise de X2 obtivemos uma região permitida para os parâmetros de oscilação padrão de neutrinos atmosféricos, a diferença quadrática de massas, e o ângulo de mistura, sen2(2?23), compatível com a existente na literatura. Como um teste para oscilação não padrão introduzimos o modelo de neutrinos com massa variável(MaVaN¿s), no qual a massa dos neutrinos depende da densidade do meio. Tal efeito é obtido ao incluir um acoplamento do tipo Yukawa entre os neutrinos e um campo escalar neutro cuja concentração depende da densidade do meio. Estudamos como a inclusão deste efeito altera a probabilidade de oscilação Pµ?µ e, consequentemente, a descrição dos dados de Super-Kamiokande. Obtemos um limite para o parâmetro aMaV aN responsável pela intensidade deste novo efeito, sendo que soluções cuja intensidade do efeito de MaVaN é de 40% ou maior, em comparação com a intensidade da oscilação padrção são excluídas com 90% de nível de confiança
Abstract: In this work we obtain in a independent way the description of the angular distribution of atmospheric neutrino events as seen by the Super-Kamiokande collaboration for the events in the sub-GeV and multi-GeV range. As a first step in this description, we study the neutrino-nucleon charged current cross section for the hole energy range of the experiment, and obtain the number of neutrino events as a function of energy and zenith angle. Including neutrino oscillations in the picture allows us to describe the data from the Super-Kamiokande experiment. We obtain the allowed region for the oscillation parameters ?m223 and sin2(2?23) in reasonable agreement with the result found in the literature. As a test for a non-standard oscillation mechanism we introduce the concept of MaVaN (Mass Varying Neutrinos), derived from the coupling of the neutrinos with a neutral scalar who has its concentration depending of local matter density. The neutrino oscillation probability so changes from the standard oscillation with consequences for the allowed region of oscillation parameters. The parameter amavan describes the relative weight of usual oscillation terms and the MaVaN terms, being aMaV aN = 1 when the two terms are equal. We have found that aMaV aN should be smaller then 0,4 at 90 % C.L.
Doutorado
Física
Doutor em Ciências
Styles APA, Harvard, Vancouver, ISO, etc.
4

Stachurska, Juliana. « Astrophysical Tau Neutrinos in IceCube ». Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21611.

Texte intégral
Résumé :
Das IceCube Neutrino Observatorium am Südpol hat die Existenz eines diffusen astrophysikalischen Neutrinoflusses nachgewiesen. Die Flavor-Zusammensetzung astrophysikalischer Neutrinos trägt Informationen über Orte kosmischer Teilchenbeschleunigung und Auswirkungen potenzieller neuer Physik auf die Neutrinoausbreitung. Zur seiner Bestimmung ist die Beobachtung von Tau-Neutrinos nötig. Ab einer Energie von ~O(100 TeV) kann deren Wechselwirkung über geladene Ströme eine Doppelkaskaden-Topologie ergeben, bei der die zwei Energiedepositionen am Tau-Entstehungs- und Tau-Zerfallsvertex aufgelöst werden können. Diese wird zusammen mit den bereits bekannten Topologien Einzel-Kaskade und Spur zur Messung der Flavor-Zusammensetzung auf der Erde benutzt. In dieser Arbeit werden im Detektorvolumen von IceCube anfangende Ereignisse mit hohen Energien algorithmisch in drei Topologien klassifiziert. Im Datensatz mit einer Lebensdauer von 7.5 Jahren werden zum ersten Mal zwei Doppelkaskaden identifiziert; diese sind Kandidaten für Tau-Neutrinos. Die Eigenschaften der zwei Tau-Neutrino-Kandidaten werden in einer a-posteriori Analyse im Detail studiert. Die statistische Methode wird durch einen Log-Likelihood-Quotienten-Test mit multi-dimensionalen Wahrscheinlichkeitsdichten verbessert. Eine der Doppelkaskaden ist konsistent mit dem Szenario einer misklassifizierten Einzelkaskade, während für die zweite Doppelkaskade die Wahrscheinlichkeit eines nicht-Tau-Neutrino Szenarios auf nur 3% bestimmt wird. Die gemessene Flavor-Zusammensetzung ist konsistent mit der Annahme von astrophysikalischen Neutrinos sowie mit bisher veröffentlichen Resultaten. Die Messung ergibt einen astrophysikalischen Tau-Neutrino Fluss von dPhi / dE=3.0 (-1.8,+2.2) (E / 100TeV)^(-2.87) 10^(-18) GeV^(-1) cm^(-2) s^(-1) sr^(-1), was dem ersten positiven Ergebnis für die Tau-Normalisierung entspricht. Die Nichtexistenz eines astrophysikalischen Tau-Neutrino Flusses wird mit einer Signifikanz von 2.8 sigma abgelehnt.
The IceCube neutrino observatory at the South Pole has confirmed the existence of a diffuse astrophysical neutrino flux. The flavor composition of astrophysical neutrinos carries information on the environments at the sites of cosmic particle acceleration as well as potential imprints of new physics acting during neutrino propagation. To measure the flavor composition the observation of the long-elusive tau neutrinos is required. Starting at an energy of ~O(100 TeV) a tau neutrino charged current interaction can produce a double cascade topology, where the two energy depositions from the tau creation and the tau decay vertices are resolvable. This topology together with the well-established track and single cascade topology is used to measure the flavor composition on Earth. In this work, high-energy events starting in IceCube's detector volume are classified algorithmically into the three topologies. In the dataset with a livetime of 7.5 years, two events are classified as double cascades for the first time, yielding multi-TeV tau-neutrino candidates. The properties of the two tau-neutrino candidates are investigated in an a-posteriori analysis. The statistical method is improved by performing a log-likelihood-ratio test using multi-dimensional probability densities. One of the double cascades is consistent with being a misclassified single cascade, while the second double cascade is found to have a misclassification probability of only 3%. The measured flavor composition nu_e:nu_mu:nu_tau = 0.20:0.39:0.42 is consistent with astrophysical neutrinos and with previously published results. The astrophysical tau-neutrino flux is measured to dPhi / dE=3.0 (-1.8,+2.2) (E / 100TeV)^(-2.87) 10^(-18) GeV^(-1) cm^(-2) s^(-1) sr^(-1) with spectral index gamma=2.87 (-0.20,+0.21), yielding the first non-zero results for the tau normalization. The absence of an astrophysical tau-neutrino flux is disfavored at 2.8 sigma.
Styles APA, Harvard, Vancouver, ISO, etc.
5

George, Jeffrey S. « Experimental study of the atmospheric [Nu][mu]/[Nu]e ratio in the multi-GeV energy range / ». Thesis, Connect to this title online ; UW restricted, 1998. http://hdl.handle.net/1773/9752.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
6

Manzanillas, Luis. « Development of the source calibration system of the STEREO experiment and search for sterile neutrinos at the ILL ». Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAY079/document.

Texte intégral
Résumé :
L'expérience STEREO a été proposé afin de donner une réponse sans ambiguïté àl'idée d'un état de neutrino stérile léger ($Delta m^{2}sim 1eV^{2}$) comme l'origine del'anomalie réacteur des antineutrinos. Le but de l'expérience est de confirmer ou de rejetercette hypothèse en recherchant un patron d'oscillation à courte distance (9-11 m) dans lespectre en énergie des $overline{nu_{e}}$'s émis par le réacteur nucléaire de recherchede l'Institut Laue-Langevin à Grenoble (France). A cet effet, le détecteur estcomposé de 2 tonnes du liquide scintillant dopé au Gd et lu par un réseau detubes photomultiplicateurs, et est segmenté en 6 cellules dans la direction depropagation des antineutrinos. Les $overline{nu_{e}}$'s sont détectés par le processusIBD en observant un signal corrélé dans letemps d'un dépôt d'énergie rapide d'un positron et un signal retardé produitpar la capture d'un neutron. La mesure des petites oscillations deformantle spectre d'énergie des antineutrinos nécessite une bonne résolution en énergieet une excellente connaissance de la réponse du détecteur. Ce manuscrit présenteune étude de simulation détaillée basée sur le logiciel Geant4 STEREO, ce quia permis le développement du système de calibration par sources. Ce système aété conçu pour répondre à toutes les exigences physiques de STEREO: calibrerl'échelle de l'énergie et de l'efficacité de capture de neutrons au niveau de 2%,connaître la réponse en énergie dans le spectre d'énergie réacteur antineutrino(1-8 MeV), étudier et la caractériser la réponse et des non-uniformités dudétecteur. A cet effet, on propose un système de calibration consistant en trois sous-systèmes:un sous-système automatisé pour déplacer des sources radioactives autour dudétecteur pour calibrer l'échelle en énergie dans chaque cellule de manièreindépendante. Un second sous-système pour déplacer une source AmBe sous ledétecteur, dont l'objectif est d'inter-calibrerl'efficacité de capture de neutrons entre les cellules. Enfin, un troisième systèmemanuel qui consistent en trois tubes de calibration placés à l'intérieur du liquidescintillante pour évaluer l'efficacité absolue de la capture des neutrons danstrois cellules différentes. La dernièrepartie de ce manuscrit est consacré à l'étude et la caractérisation du bruite de fond gammaet les signaux neutrino attendus
The STEREO experiment has been proposed to give an unambiguous responseto the hypothesis of a light sterile neutrino state ($Delta m^{2}sim 1 eV^{2}$)as the origin of the reactor antineutrino anomaly. Its goal is to confirm or reject thishypothesis by searching at short distance (9-11 m) for a neutrino oscillation patternin the energy spectrum of the $overline{nu_{e}}$’s emitted by the research nuclear reactorof the Laue-Langevin Institute in Grenoble (France). To this end, the detector iscomposed of 2 tons of Gd-loaded liquid scintillator read out by an array of PMTs, andis segmented in 6 cells in the direction of the $overline{nu_{e}}$’s propagation. Antineutrinosare detected via the IBD process by observing a time correlatedsignal composed of a prompt energy deposit from a positron and a delayed signal produced bythe neutron capture. Measuring small oscillations superimposed on the reactor antineutrinoenergy spectrum requires a good energy resolution and an excellent knowledge ofthe detector response. This manuscript presents a dedicated Geant4 simulation studyof a calibration system based on radioactive sources.This system has been conceived to fulfill all the STEREO physics requirements:calibrating the energy scale and the neutron capture efficiency at the 2 % level,knowing the energy response in the reactor antineutrino energy spectrum (0-8 MeV),and characterizing the detector response in a broader sense (non-uniformities, non-linearity,particle identification, etc). To this end, we proposethree calibration subsystems: one automated subsystem to moveradioactive sources around the detector, whose main role is to calibrate the energy scale in each cellindependently; a second subsystem to inter-calibrate the neutron captureefficiency between cells by moving an AmBe source under the detector; and finally,a third subsystem consisting in three manualcalibration tubes inside the liquid scintillator, necessary to assess the absolute neutron captureefficiency inside three different cells. The final part of this manuscript is devoted tothe study of the selection criteria, and the proposal of methods to reject the expected gammabackground
Styles APA, Harvard, Vancouver, ISO, etc.
7

Pascoal, Kellen Alves. « Neutrino-magnetohidrodinâmica, oscilações de neutrinos e instabilidades em plasmas ». reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/180517.

Texte intégral
Résumé :
Foi feita uma modificação da teoria magnetohidrodinâmica, incorporando a dinâmica dos neutrinos, chamada magnetohidrodinâmica de neutrinos. Elétrons e íons foram toma- dos como não-relativísticos, juntamente com os neutrinos eletrônicos (ultra) relativísticos acoplados via força eletro-fraca. Devido à ressonância com um feixe de neutrinos, foi prevista a desestabilização das ondas magnetosônicas rápidas. Admitindo modos oblí- quos, é possível detectar uma instabilidade que se torna mais forte quando o vetor de onda é paralelo ao campo magnético de equilíbrio, associando-se à onda magnetosônica lenta. Assumindo perturbações eletrostáticas em um plasma magnetizado composto por elétrons em um fundo iônico neutro, acoplado a neutrinos eletrônicos, foi considerado o papel desestabilizador dos feixes de neutrinos quanto aos modos de Trivelpiece-Gould. O campo magnético aumenta significativamente a taxa de crescimento linear, conforme cal- culado para os parâmetros de supernovas tipo II. Para o caso não magnetizado, a taxa de crescimento da instabilidade é encontrada para o vetor de onda paralelo ou perpendicular ao campo magnético substituindo-se a frequência de plasma pela frequência apropriada de Trivelpiece-Gould. Adicionalmente, considerou-se um modelo que combina as interações neutrino-plasma e as oscilações de sabores de neutrinos. Neste contexto, estudou-se o acoplamento entre ondas íon-acústicas e oscilações de sabores de neutrinos, obtendo-se uma nova instabilidade. Mostrou-se que a taxa de crescimento desta instabilidade não é modificada pela inclusão de efeitos colisionais.
A modification of the magnetohydrodynamic theory was made incorporating the dyna- mics of neutrinos, called neutrino magnetohydrodynamics. Electrons and ions were taken as non-relativistic, along with (ultra) relativistic electron neutrinos coupled via electro- weak force. Due to the resonance with the neutrino beam the destabilization of the fast magnetosonic wave was predicted. Then, oblique modes were admitted, resulting in a detection of an instability, which becomes stronger when the wave vector is parallel to the equilibrium magnetic field, associating with the slow magnetosonic wave. For the simplest case, assuming electrostatic perturbations in a magnetized plasma composed of electrons on a neutral ionic background, coupled with electronic neutrinos, the destabilizing role of the neutrino beams in Trivelpiece-Gould modes was considered. The magnetic field signi- ficantly increases the linear growth rate, as calculated for type II supernova parameters. For the nonmagnetized case, the growth rate of instability is found for the wave vector parallel or perpendicular to the magnetic field, replacing the plasma frequency with the appropriate frequency of Trivelpiece-Gould. For oblique propagation the growth rate is also found. Subsequently, a model combining neutrino-plasma interactions and neutrino flavor oscillations was studied in the case of the coupling between the ion-acoustic wa- ves and the oscillations of neutrino flavors. When included collision effects, the rate of growth of instability has shown that the coupling between the ion-acoustic waves and the oscillations of neutrino flavors in a completely ionized plasma remain the same.
Styles APA, Harvard, Vancouver, ISO, etc.
8

Tapia, Herrera Luis Carlos 1982. « Fenomenologia dos decaimentos de neutrinos de supernova ». [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278537.

Texte intégral
Résumé :
Orientador: Orlando Luis Goulart Peres
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
Made available in DSpace on 2018-08-19T13:26:00Z (GMT). No. of bitstreams: 1 TapiaHerrera_LuisCarlos1982-_M.pdf: 3198399 bytes, checksum: bd22a4c22f21d4db7bc8f29cda4bd521 (MD5) Previous issue date: 2011
Resumo: Apresentamos neste trabalho um estudo da fenomenologias dos neutrinos, que inicia com um modelo além do Modelo Padrão, que gera massa e decaimento para os neutrinos. O modelo foi proposto por Gelmini e Roncadelli [3], no modelo é introducido um tripleto escalar que interage com o dubleto de Higgs a través de um potencial escalar. O tripleto interage também com os leptons da teoria a través de um potencial de Yukawa, é este potencial que conjuntamente com a quebra espontânea da simetria gera as massas e decaimentos para os neutrinos. O modelo foi descartado experimentalmente mas modelos mais gerais que estão baseados no modelo de Gelmini e Roncadelli, ainda podem ser testados experimentalmente. Como seguinte passo no nosso trabalho, estudamos os fluxos de neutrinos de Supernovas que aconteceram no passado do Universo e que chegam até à Terra. Estudamos os efeitos de oscilação na matéria, por causa de que o neutrino atravessa médios de densidades altas dentro da Supernova. Fizemos a comparação dos fluxos de neutrinos e antineutrinos eletrônicos, levando em conta dois casos com e sem oscilação. Encontramos que a oscilação faz com que o fluxo de neutrinos e antineutrinos seja menor, e mais quente para energias maiores a 10 MeV. Estudamos conjuntamente o decaimento e suas consequencias no fluxo de neutrinos de Supernova relíquia. Encontramos uma forte dependência com a hierarquia de massas dos neutrinos. Concluímos que se a hierarquia de massas é normal, o decaimento faz com que o fluxo de neutrinos e antineutrinos eletrônicos seja incrementado. Se a hierarquia é invertida encontramos que o fluxo dos dois tipos de neutrinos é suprimido. Fizemos também uma comparação dos fluxos obtidos neste trabalho, com valores de fluxos reportados na literatura. Finalmente estudamos o comportamento do número de eventos dos fluxos de neutrinos e antineutrinos eletrônicos, para distintos tempos de vida dos neutrinos
Abstract: Here we present a study of the phenomenology of neutrinos, which starts with a model beyond the Standard Model, which generates mass and decay to neutrinos. The model was proposed by Gelmini and Roncadelli cite Gelmini: 1981, the model needs a triplet that interacts with the scaling doublet Higgs through different potential climb. The triplet also interacts with leptons theory through different potential of Yukawa, is this potential which, together with spontaneous symmetry breaking generates the masses and decays to neutrinos. The model was experimentally ruled out but more general models that are based on the model of Gelmini and Roncadelli, can still be tested experimentally. As a next step in our work, we study the flow of neutrinos from supernovae that happened in the past of the universe and reach the Earth. We studied the effects of oscillations in matter, because of the neutrino cross mean high densities within the Supernova. We compared the flow of neutrinos and antineutrinos electronics, taking into consider two cases with and without oscillation. We have found that the oscillation causes the flux of neutrinos and antineutrinos is smaller and warmer to higher energies to 10 MeV We studied together and the decay and its consequences in the flow of neutrinos from supernova relic. We find a strong dependence on the hierarchy mass of neutrinos. We conclude that if the hierarchy is normal masses, the decay is that the flux of neutrinos and electronic antineutrinos is incremented. If the hierarchy is found that the reverse flow of the two types of neutrinos is deleted. We also a comparison of fluxes obtained in this work, with values of flows reported in the literature. Finally we study the behavior of the number of events flows of neutrinos and antineutrinos electronics, for different lifetimes of neutrinos
Mestrado
Física
Mestre em Física
Styles APA, Harvard, Vancouver, ISO, etc.
9

Boriero, Daniel Francisco 1981. « Fenomenologia de neutrinos massivos em cosmologia ». [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278586.

Texte intégral
Résumé :
Orientador: Pedro Cunha de Holanda
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
Made available in DSpace on 2018-08-22T08:38:27Z (GMT). No. of bitstreams: 1 Boriero_DanielFrancisco_D.pdf: 1994859 bytes, checksum: a59e512b9fdcb71d04bb5f9702f0fb60 (MD5) Previous issue date: 2013
Resumo: Cosmologia de neutrinos é a atividade de pesquisa dedicada ao teste de propriedades de neutrinos através de observáveis cosmológicos. Particularmente, as propriedades estudadas e testadas ao longo desta tese de doutorado foram à massa dos neutrinos e o número de estados estéreis. Ambas as propriedades são motivadas pela observação em experimentos terrestres do fenômeno de oscilação entre estados de interação. Diferentemente da existência de estados massivos, os indícios da existência de estados estéreis são tenuemente sugeridos, contudo ambas as propriedades representariam um grande impacto no modelo cosmológico caso sejam observados sinais positivos de suas existências e por esse motivo justificam-se suas análises. A utilização da cosmologia como um laboratório de física de neutrinos é possível graças à imensa abundância de neutrinos remanescentes do universo primordial além da sensibilidade sem precedentes das observações realizadas. Telescópios e detectores em planejamento ou em implementação supostamente alcançarão a sensibilidade equivalente aos valores mínimos das massas determinados pelo fenômeno de oscilação. A perspectiva de tais sensibilidades experimentais deve ser acompanhada pelo aumento equivalente da precisão obtida nas previsões teóricas dos efeitos pelos quais pretende-se detectar a presença de neutrinos massivos ou de estados estéreis. Nesta tese de doutorado, além de ser detalhadamente desenvolvida a teoria e a metodologia convencionais na análise de dados cosmológicos para obtenção de medidas ou limites para estes dois parâmetros, também foram desenvolvidos métodos para aumentar a precisão da previsibilidade teórica. Foram abordados dois desafios teóricos prementes, a imprecisão das previsões no regime não-linear de perturbação para neutrinos massivos e a degenerescência em relação aos parâmetros de modelos cosmológicos estendidos. As melhorias obtidas não compõem soluções definitivas, mas sim metodologias a serem desenvolvidas sistematicamente ao longo da obtenção de novos dados reais e simulados.
Abstract: Neutrino cosmology is the research activity dedicated to test neutrino properties by cosmological observables. Specially, the properties studied and tested along this graduate research were the neutrino mass and the sterile states. Both properties are motivated from observations in terrestrial experiments of the phenomenon of oscillation between interaction states. Differently from the existence of massive states, the signals of sterile states are weakly suggested, however both properties would mean a sizeable impact in the cosmological model in case any positive signal is detected and, therefore, their analysis are justified. The utilization of cosmology as a laboratory of neutrino physics is possible thanks to the high abundance of remaining neutrinos from the primordial universe, besides the unprecedented sensitivity of experimental observations. Telescopes and detectors planned or under construction will supposedly reach the sensitivity equivalent to the minimal neutrinos masses given by the oscillation phenomenum. The perspective of such experimental sensitivities must be followed by the equivalent improvement in the theoretical predictability for the effects with which it is intended to detect a positive signal of massive neutrinos or sterile states. In this Ph.D. Thesis, besides being developed in detail the theory and methodology used in the analysis of cosmological data to measure or constrain these two parameters, we also developed methods and tools to improve the theoretical predictability. Two pressing theoretical challenges were addressed, the imprecision of the predictions in the non-linear regime of perturbations for massive neutrinos and the degeneracy related to parameters of extended cosmological models. The improvements obtained do not make up a definitive solution, but rather methodologies to be systematically developed along with the achivement or the eventuality of new real and simulated data.
Doutorado
Física
Doutor em Ciências
Styles APA, Harvard, Vancouver, ISO, etc.
10

Basto, Gonzalez Victor Saul 1977. « Procura de indícios de neutrinos estéreis nos experimentos IceCube e KATRIN ». [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276982.

Texte intégral
Résumé :
Orientador: Orlando Luis Goulart Peres
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
Made available in DSpace on 2018-08-24T13:21:19Z (GMT). No. of bitstreams: 1 BastoGonzalez_VictorSaul_D.pdf: 37659795 bytes, checksum: f4492cea9594ac4fbffc288a0c46526a (MD5) Previous issue date: 2014
Resumo: Motivados pelos indícios experimentais da existência de um quarto neutrino, que surge nos dados de oscilações coletados nos experimentos de aparecimento e desaparecimento de neutrinos, e pela possibilidade teórica de explicar a pequena massa dos neutrinos através de dimensões extras grandes, fizemos análises em procura de vestígios destas duas motivações nos experimentos IceCube e KATRIN. A existência deste quarto neutrino implicaria 1) que existem mais neutrinos que os três tipos de neutrinos do Modelo Padrão da física de partículas, 2) que as interações deste novo neutrino não são descritas pelo Modelo Padrão, 3) que os parâmetros da mistura dos três tipos de neutrinos do Modelo Padrão seriam afetados pela mistura com este novo neutrino e 4) que a diferença dos quadrados das massas, ?m^{2}, associada a este neutrino seria grande, ?m^{2} ~1 eV^{2}. Usando os dados de neutrinos atmosféricos de IceCube, podemos indagar pela existência do quarto neutrino, pois para, ?m^{2} ~1 eV^{2} acontece uma conversão de sabor devida ao efeito de matéria sobre o neutrino no intervalo de energias analisado no IceCube. Assim, este efeito de matéria permite-nos pôr limites sobre os parâmetros que governam as oscilações de neutrinos estéreis. O experimento KATRIN procurará medir a massa do neutrino. Esta medida será feita analisando a cinemática dos elétrons emitidos no decaimento beta do Trítio que é uma medida independente do modelo físico, pois está fundamentada na conservação da energia. A presença de estados mais pesados, como os que existem quando neutrinos estéreis estão presentes, nos permitirá vincular estes neutrinos estéreis. Especificamente, analisamos em KATRIN indícios de um e dois neutrinos estéreis e também de dimensões extras grandes
Abstract: Motivated by the experimental evidence of the existence of a fourth neutrino, which arises from the data collected of neutrino oscillations in appearance and disappearance experiments, and by the theoretical possibility to explain the smallness of the mass of the neutrinos through large extra dimensions, we performed analyses in search of seeking indication of these two motivations in the IceCube and KATRIN experiments. The existence of this fourth neutrino would imply 1) that there are more types of neutrinos than the three types of neutrinos present in the Standard Model of particle physics, 2) that this new neutrino interactions are not described by the Standard Model, 3) that the parameters of the three neutrinos mixing would be affected by mixing with this new type of neutrino, and 4) that the squared-mass difference , ?m^{2} associated with this new neutrino would be large, , ?m^{2} ~1 eV^{2}. Using the atmospheric neutrino data from IceCube, we can investigate the existence of the fourth neutrino because a flavor conversion happens in the limit , ?m^{2} ~1 eV^{2} due to the effect of matter on the neutrino in the range of energies analyzed in the IceCube. Thus, this matter effect allows us to constrain the parameters that govern the sterile neutrino oscillations. The KATRIN experiment will seek to measure the neutrino mass. This measure will be performed by analyzing the kinematics of electrons emitted in the tritium beta decay, which is an independent measure of the physical model because it is based on energy conservation. The presence of heavier states such as those that exist when sterile neutrinos are present, will allow us to constrain these sterile neutrinos. Specifically, we analyze in KATRIN evidence of one and two sterile neutrinos and also of large extra dimensions
Doutorado
Física
Doutor em Ciências
Styles APA, Harvard, Vancouver, ISO, etc.
Plus de sources

Livres sur le sujet "Neutrinole"

1

1949-, Cherry M. L., Lande K et Fowler William A, dir. Solar neutrinos and neutrino astronomy : (Homestake, 1984). New York : American Institute of Physics, 1985.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
2

1930-, Winter Klaus, dir. Neutrino physics. Cambridge [England] : Cambridge University Press, 1991.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
3

1930-, Winter Klaus, dir. Neutrino physics. 2e éd. Cambridge, UK : Cambridge University Press, 2000.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
4

1938-, Barger V., dir. Neutrino masses and neutrino astrophysics : Including Supernova 1987a : Ashland, Wisconsin, 1987. Singapore : World Scientific Pub. Co., 1987.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
5

L, Bergström, dir. Neutrino physics : Proceedings of Nobel Symposium 129 : Haga Slott, Enköping, Sweden, August 19-24, 2004. New Jersey : World Scientific, 2005.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
6

Fritzsch, Harald. Massive neutrinos : Flavor mixing of leptons and neutrino oscillations. Singapore : World Scientific, 2015.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
7

1922-, Kitagaki T., Yuta H. 1932- et Tōhoku Daigaku, dir. Proceedings of the 12th International Conference on Neutrino Physics and Astrophysics, Sendai, June 3-8, 1986. Singapore : World Scientific Pub. Co., 1987.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
8

International, Conference on Neutrino Physics and Astrophysics (1992 Granada Spain). Neutrino 92 : Proceedings of the 15th International Conference on Neutrino Physics and Astrophysics, Granada, Spain, 7-12 June 1992. Amsterdam : North-Holland, 1993.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
9

International, Conference on Neutrino Physics and Astrophysics (19th 2000 Sudbury Canada). Neutrino 2000 : Proceedings of the XIXth International Conference on Neutrino Physics and Astrophysics, Sudbury, Canada, 16-21 June 2000. Amsterdam : North Holland, 2001.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
10

International, Conference on Neutrino Physics and Astrophysics (13th 1988 Medford Mass ). Proceedings of the 13th International Conference on Neutrino Physics and Astrophysics, Boston (Medford), June 5-11, 1988. Singapore : World Scientific Pub. Co., 1989.

Trouver le texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
Plus de sources

Chapitres de livres sur le sujet "Neutrinole"

1

Ejiri, Hiroyasu. « Neutrino-less double beta decays and Majorana neutrinos ». Dans PAVI09, 51–56. Dordrecht : Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-4023-5_12.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
2

Ronga, F. « Atmosperic Neutrinos and Neutrino Oscillations in the Macro Experiment ». Dans Cosmic Radiations : From Astronomy to Particle Physics, 117–30. Dordrecht : Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0634-7_10.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
3

Ando, Shin’ichiro, et Katsuhiko Sato. « Supernova Relic Neutrinos and Observational Implications for Neutrino Oscillation ». Dans Beyond the Desert 2003, 717–28. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18534-2_47.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
4

von Feilitzsch, F. « Neutrino Properties ». Dans Neutrinos, 1–33. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-46648-9_1.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
5

Gelmini, G. « Neutrinos in Cosmology ». Dans Neutrinos, 309–38. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-46648-9_10.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
6

Winter, K. « Neutrino Reactions and the Structure of the Neutral Weak Current ». Dans Neutrinos, 35–70. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-46648-9_2.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
7

Langacker, P. « Massive Neutrinos in Gauge Theories ». Dans Neutrinos, 71–115. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-46648-9_3.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
8

Mohapatra, R. N. « Neutrinos in Left-Right Symmetric, SO(10) and Superstring Inspired Models ». Dans Neutrinos, 117–46. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-46648-9_4.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
9

Avignone, F. T., et R. L. Brudzinski. « Double Beta Decay Experiments and Searches for Dark Matter Candidates and Solar Axions ». Dans Neutrinos, 147–81. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-46648-9_5.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
10

Muto, K., et H. V. Klapdor. « Double Beta Decay, Neutrino Mass and Nuclear Structure ». Dans Neutrinos, 183–237. Berlin, Heidelberg : Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-46648-9_6.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.

Actes de conférences sur le sujet "Neutrinole"

1

Yurchenko, V., et A. Ivanchik. « Relic neutrinos distribution function at low coordinate momentums ». Dans ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021. Crossref, 2022. http://dx.doi.org/10.51194/vak2021.2022.1.1.170.

Texte intégral
Résumé :
The effect of processes p + e − → n + ν e and µ + → e + + ν̃ µ + ν e on relic neutrino distribution function in the region ofsmall coordinate momentums is studied. The Boltzmann kinetic equation on the electron neutrino distribution function issolved in this region at temperatures above 10 MeV taking into account generation of electron neutrinos due to the aboveprocesses in the assumption that at these temperatures neutrinos of larger momentums are thermalized instantaneously.The effect of thermalization of neutrinos due to their scattering on electrons and positrons on the distribution function inthis region at temperatures lesser than 10 MeV is examined.
Styles APA, Harvard, Vancouver, ISO, etc.
2

Zhou, Fan, Yang Du, Zhiping Chen, Shaojing Hou et Yuekun Heng. « Design and Application of an Equator Flexible Supported Acrylic Spherical Vessel for Neutrino Detector ». Dans ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84128.

Texte intégral
Résumé :
The second stage of the Daya Bay neutrino experiment, the Jiangmen Underground Neutrino Observatory (JUNO), will be launched to investigate more neutrino physics. The vessel, which is used to contain the liquid target for detecting neutrinos, plays a significant role in JUNO. It must meet diverse design criteria according to the requirements for physics measurement and safe operation. This paper proposed an alternative structural scheme for the containment vessel. Acrylic is selected as the material for its high transparency and excellent mechanical properties. A sphere 35.5m in diameter is chosen as the optimum shape of the vessel. The sphere is supported at its equator boss by beams and rods. And a rubber layer functions as buffer between acrylic and steel supporting structures to avoid rigid contact. The preliminary design of the scheme is given and verified by finite element analysis. Results show that this scheme can meet the requirements of strength and stability and should be a feasible choice for JUNO.
Styles APA, Harvard, Vancouver, ISO, etc.
3

Lin, T. « EVENT INDEX BASED CORRELATION ANALYSIS FOR THE JUNO EXPERIMENT ». Dans 9th International Conference "Distributed Computing and Grid Technologies in Science and Education". Crossref, 2021. http://dx.doi.org/10.54546/mlit.2021.49.10.001.

Texte intégral
Résumé :
The Jiangmen Underground Neutrino Observatory (JUNO) experiment is mainly designed todetermine the neutrino mass hierarchy and precisely measure oscillation parameters by detectingreactor anti-neutrinos. The total event rate from DAQ is about 1 kHz and the estimated volume of rawdata is about 2 PB/year. But the event rate of reactor anti-neutrino is only about 60/day. So one of thechallenges for data analysis is to select sparse physics signal events in a very large amount of data,whose volume can not be reduced by using the traditional data streaming method. In order to improvethe speed of data analysis, a new correlated data analysis method has been implemented based onevent’s index data. The index data contain the address of events in the original data files as well as allthe information needed by event selection, which are produced in event pre-processing using theJUNO’s Sniper-based offline software. The index data are subsequently selected by using refinedselection criteria with Spark so that the volume of index data is further reduced. At the final stage ofdata analysis, only the events within the time window are loaded according to the event address in theindex data. A performance study shows that this method achieves a 14-fold speedup compared tocorrelation analysis by reading all the events. This contribution will introduce detailed software designfor event index-based correlation analysis and present performance measured with a prototype system.
Styles APA, Harvard, Vancouver, ISO, etc.
4

Stanev, Todor. « ATMOSPHERIC NEUTRINOS AND NEUTRINO OSCILLATIONS ». Dans Proceedings of the International School of Cosmic Ray Astrophysics 20th Anniversary, 11th Course. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793997_0004.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
5

Kang, Sin Kyu. « Neutrinoless double beta decay, Majonara neutrino masses and Neutrino Oscillations ». Dans Proceedings of the Sixth Workshop. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812778352_0004.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
6

ANDO, SHIN’ICHIRO, et KATSUHIKO SATO. « SUPERNOVA RELIC NEUTRINOS AND NEUTRINO OSCILLATION ». Dans Proceedings of the Fourth International Workshop. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812703101_0007.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
7

NARDI, E. « MEASURING NEUTRINO MASSES WITH SUPERNOVA NEUTRINOS ». Dans Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF). World Scientific Publishing Company, 2006. http://dx.doi.org/10.1142/9789812704030_0079.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
8

López-Pavón, Jacobo, Daniel Kaplan, Maury Goodman et Zack Sullivan. « Sterile neutrinos at a Neutrino Factory ». Dans NEUTRINO FACTORIES, SUPERBEAMS, AND BETA BEAMS : 11th International Workshop on Neutrino Factories, Superbeams and Beta Beams—NuFact09. AIP, 2010. http://dx.doi.org/10.1063/1.3399279.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
9

Ranucci, G. « Low-Energy Neutrino Experiments (Solar Neutrinos) ». Dans The 28th International Symposium on Lepton Photon Interactions at High Energies. WORLD SCIENTIFIC, 2020. http://dx.doi.org/10.1142/9789811207402_0007.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
10

AVIGNONE, F. T., et G. S. KING. « THE NEUTRINO MIXING MATRIX, NEUTRINO OSCILLATIONS, AND NEUTRINOLESS DOUBLE-BETA DECAY ». Dans Proceedings of the Fourth International Workshop. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812791313_0082.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.

Rapports d'organisations sur le sujet "Neutrinole"

1

Wolfenstein, L. Neutrino masses and solar neutrinos. Office of Scientific and Technical Information (OSTI), janvier 1992. http://dx.doi.org/10.2172/6967046.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
2

Wolfenstein, L. Neutrino masses and solar neutrinos. Office of Scientific and Technical Information (OSTI), novembre 1992. http://dx.doi.org/10.2172/10187797.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
3

Elliott, Steven. Neutrinoless double beta decay and the neutrino. Office of Scientific and Technical Information (OSTI), juin 2021. http://dx.doi.org/10.2172/1787275.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
4

Fuyuto, Kaori. Neutrinoless double beta decay with light sterile neutrinos. Office of Scientific and Technical Information (OSTI), janvier 2023. http://dx.doi.org/10.2172/1908468.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
5

Gollapinni, Sowjanya. Unlocking the Mysteries of Neutrinos with the Deep Underground Neutrino Experiment. Office of Scientific and Technical Information (OSTI), mars 2021. http://dx.doi.org/10.2172/1771069.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
6

Dishaw, j. The Production of Neutrinos and Neutrino-like Particles in Proton-Nucleus Interactions. Office of Scientific and Technical Information (OSTI), juin 2018. http://dx.doi.org/10.2172/1453961.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
7

Coleman, Stephen James. A measurement of neutrino oscillations with muon neutrinos in the MINOS experiment. Office of Scientific and Technical Information (OSTI), mai 2011. http://dx.doi.org/10.2172/1023978.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
8

Groh, Micah. Constraints on Neutrino Oscillation Parameters from Neutrinos and Antineutrinos with Machine Learning. Office of Scientific and Technical Information (OSTI), janvier 2021. http://dx.doi.org/10.2172/1774291.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
9

Mendez Mendez, Diana Patricia. Search for Muon Neutrino Disappearance in the Booster Neutrino Beam of Fermilab ; Busqueda de Desaparicion de Neutrinos del Muon en el Haz de Neutrinos del Booster de Fermilab. Office of Scientific and Technical Information (OSTI), janvier 2015. http://dx.doi.org/10.2172/1209242.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
10

Lister, Adam. Constraint of Systematic Uncertainties in an Electron Neutrino Search Using Muon Neutrinos at MicroBooNE. Office of Scientific and Technical Information (OSTI), janvier 2019. http://dx.doi.org/10.2172/1570192.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
Vous pouvez également être intéressé par les bibliographies sur le sujet « Neutrinole » pour d’autres types de sources :
Articles de revues Thèses Livres
Nous offrons des réductions sur tous les plans premium pour les auteurs dont les œuvres sont incluses dans des sélections littéraires thématiques. Contactez-nous pour obtenir un code promo unique!

Vers la bibliographie