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Academic literature on the topic 'Neutrino'

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Published: 4 June 2021
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Journal articles on the topic "Neutrino"

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Daywitt, William C. "The Neutrino Decay of the Free Neutron and the Neutrino Structure According to the Planck Vacuum Theory." European Journal of Engineering and Technology Research 6, no. 5 (July 27, 2021): 73–75. http://dx.doi.org/10.24018/ejers.2021.6.5.2524.

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The Planck vacuum (PV) theory derives equations for the neutrino and antineutrino, and relates them to the unstable free neutron and antineutron. Remarkably, these neu- trons and neutrinos share the same wavefunction solutions that describe the proton and electron and their antiparticle cores. The neutrino and antineutrino are chargeless and massless; so their propagation through matter goes unnoticed, making these neutrinos invisible. The equations to follow that describe these pseudo-particles are the theoretical embodiment of the circa 1930 Pauli neutrino hypothesis. Finally, depending on one’s perspective, the neutrons can be viewed as decaying meta-particles or as stable nuclear particles.
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Daywitt, William C. "The Neutrino Decay of the Free Neutron and the Neutrino Structure According to the Planck Vacuum Theory." European Journal of Engineering and Technology Research 6, no. 5 (July 27, 2021): 73–75. http://dx.doi.org/10.24018/ejeng.2021.6.5.2524.

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The Planck vacuum (PV) theory derives equations for the neutrino and antineutrino, and relates them to the unstable free neutron and antineutron. Remarkably, these neu- trons and neutrinos share the same wavefunction solutions that describe the proton and electron and their antiparticle cores. The neutrino and antineutrino are chargeless and massless; so their propagation through matter goes unnoticed, making these neutrinos invisible. The equations to follow that describe these pseudo-particles are the theoretical embodiment of the circa 1930 Pauli neutrino hypothesis. Finally, depending on one’s perspective, the neutrons can be viewed as decaying meta-particles or as stable nuclear particles.
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Hargrove, C. K., and D. J. Paterson. "Solar-neutrino neutral-current detection methods in the Sudbury neutrino observatory." Canadian Journal of Physics 69, no. 11 (November 1, 1991): 1309–16. http://dx.doi.org/10.1139/p91-196.

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The Sudbury Neutrino Observatory will study the solar-neutrino problem through the detection of charged-current (CC), neutral-current (NC), and elastic-scattering (ES) interactions of solar neutrinos with heavy water. The measurement of the NC rate relative to the CC rate provides a nearly model-independent method of observing neutrino oscillations. The NC interaction breaks up the deuteron producing a neutron and a proton. The interaction rate in the original design is measured by observing Čerenkov light from showers produced by neutron-capture γ rays from the capture of the NC neutrons by a selected additive to the heavy water. These signals overlap the CC and ES signals, so that the measurement of the NC rate requires the subtraction of two signals obtained at different times. This paper describes our investigation of an alternate detection method in which the thermalized neutrons are captured by (n, α) or (n, p) reactions on light nuclei. The resulting charged-particle products are uniquely detected by scintillators or proportional counters, completely separating this NC signal from the CC and ES Čerenkov signals, thus simplifying its measurement, improving its significance, and allowing observation of otherwise unobservable short-term NC fluctuations. Although background rates for the new techniques have not yet been determined, the experimental advantages justify further development work.
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Caravaca, J. "SNO: Recent new results." International Journal of Modern Physics A 35, no. 34n35 (December 15, 2020): 2044012. http://dx.doi.org/10.1142/s0217751x20440121.

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The Sudbury Neutrino Observatory (SNO), whose main purpose was to study the neutrinos produced in the Sun, demonstrated that neutrinos can change flavor and, thus, they are massive particles. SNO detected and recorded neutrino and cosmic ray interactions from 1999 to 2006 and several analyses have been completed in the past year using legacy data. We present the results of the most recent ones: the measurements of neutron production in atmospheric neutrino interactions and neutron production by cosmic muons, a search for Lorentz symmetry violation in neutrino oscillations and a search for neutrino decay. A few other analyses are ongoing and we comment about their goal and status.
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Vergados, J. D., and Y. Giomataris. "Neutral current coherent cross-sections — Implications on detecting SN and earth neutrinos with gaseous spherical TPC’s." International Journal of Modern Physics E 26, no. 01n02 (January 2017): 1740030. http://dx.doi.org/10.1142/s0218301317400304.

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The detection of galactic supernova (SN) neutrinos represents one of the future frontiers of low energy neutrino physics and astrophysics. The neutron coherence of neutral currents (NCs) allows quite large cross-sections in the case of neutron rich targets, which can be exploited in detecting earth and sky neutrinos by measuring nuclear recoils. They are relatively cheap and easy to maintain. These (NC) cross-sections are not dependent on flavor conversions and, thus, their measurement will provide useful information about the neutrino source. In particular, they will yield information about the primary neutrino fluxes and perhaps about the spectrum after flavor conversions in neutrino sphere. They might also provide some clues about the neutrino mass hierarchy. The advantages of large gaseous low threshold and high resolution time projection counters (TPC) detectors are discussed.
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Chen, Zekun, Konstantin Kouzakov, Yu-Feng Li, Vadim Shakhov, Konstantin Stankevich, and Alexander Studenikin. "Collective neutrino oscillations in moving and polarized matter." Journal of Physics: Conference Series 2156, no. 1 (December 1, 2021): 012180. http://dx.doi.org/10.1088/1742-6596/2156/1/012180.

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Abstract We consider neutrino evolution master equations in dense moving and polarized matter consisted of electrons, neutrons, protons and neutrinos. We also take into account the neutrino magnetic moment interaction with a magnetic field. We point out the mechanisms responsible for the neutrino spin precession and provide the expressions for the corresponding interaction Hamiltonians that should be taken into account in theoretical treatments of collective neutrino oscillations.
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Tsakstara, V., and T. S. Kosmas. "Studying the coherent channel of neutral current ν-nucleus interaction." HNPS Proceedings 21 (March 8, 2019): 177. http://dx.doi.org/10.12681/hnps.2029.

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Original cross-sections calculations for neutral current neutrino scattering on 40Ar isotope are performed in the context of the quasi-particle random phase approximation (QRPA) by utilizing realistic two-nucleon forces. The incoming neutrino energy range adopted, εν ≤ 100 MeV, covers the supernova neutrinos, the low-energy beta-beam-neutrinos and the pion-muon stopped neutrino-beams existing or planned to be conducted at future neutron spallation sources. Subsequently, are the original cross sections convoluted with various supernova neutrino-energy distributions such as the two-parameter Fermi-Dirac and the power law distributions. The folded cross sections are obtained for various values of the parameters of these neutrino energy distributions corresponding to different supernova scenarios. One of the main purposes of this work is to explore the response of the 40Ar isotope as supernova neutrino detector.
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Mathews, G. J., L. Boccioli, J. Hidaka, and T. Kajino. "Review of uncertainties in the cosmic supernova relic neutrino background." Modern Physics Letters A 35, no. 25 (July 15, 2020): 2030011. http://dx.doi.org/10.1142/s0217732320300116.

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We review the computation of and associated uncertainties in the current understanding of the relic neutrino background due to core-collapse supernovae, black hole formation and neutron star merger events. We consider the current status of uncertainties due to the nuclear equation of state (EoS), the progenitor masses, the source supernova neutrino spectrum, the cosmological star formation rate, the stellar initial mass function, neutrino oscillations, and neutrino self-interactions. We summarize the current viability of future neutrino detectors to distinguish the nuclear EoS and the temperature of supernova neutrinos via the detected relic supernova neutrino spectrum.
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Chakraborty, Sabyasachi, Aritra Gupta, and Miguel Vanvlasselaer. "Anomaly induced cooling of neutron stars: a Standard Model contribution." Journal of Cosmology and Astroparticle Physics 2023, no. 10 (October 1, 2023): 030. http://dx.doi.org/10.1088/1475-7516/2023/10/030.

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Abstract Young neutron stars cool via the emission of neutrinos from their core. A precise understanding of all the different processes producing neutrinos in the hot and degenerate matter is essential for assessing the cooling rate of such stars. The main Standard Model processes contributing to this effect are ν bremsstrahlung, mURCA among others. In this paper, we investigate another Standard Model process initiated by the Wess-Zumino-Witten term, leading to the emission of neutrino pairs via Nγ → Nνν̅. We find that for proto-neutron stars, such processes with degenerate neutrons can be comparable and even dominate over the typical and well-known cooling mechanisms.
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Gutiérrez, Miguel, Manuel Masip, and Sergio Muñoz. "The Solar Disk at High Energies." Astrophysical Journal 941, no. 1 (December 1, 2022): 86. http://dx.doi.org/10.3847/1538-4357/aca020.

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Abstract High energy cosmic rays illuminate the Sun and produce an image that could be observed in up to five different channels: a cosmic-ray shadow (whose energy dependence has been studied by HAWC); a gamma-ray flux (observed at E ≤ 200 GeV by Fermi-LAT); a muon shadow (detected by ANTARES and IceCube); a neutron flux (undetected, as there are no hadronic calorimeters in space); a flux of high energy neutrinos. Since these signals are correlated, the ones already observed can be used to reduce the uncertainty in the still undetected ones. Here we define a simple setup that uses the Fermi-LAT and HAWC observations to imply very definite fluxes of neutrons and neutrinos from the solar disk. In particular, we provide a fit of the neutrino flux at 10 GeV–10 TeV that includes its dependence on the zenith angle and on the period of the solar cycle. This flux represents a neutrino floor in indirect dark matter searches. We show that in some benchmark models the current bounds on the dark matter–nucleon cross section push the solar signal below this neutrino floor.
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Dissertations / Theses on the topic "Neutrino"

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Cernohorsky, Jan. "Neutrino driven neutron star formation." Amsterdam : Amsterdam : Rodopi ; Universiteit van Amsterdam [Host], 1990. http://dare.uva.nl/document/91884.

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Delgadillo, Franco Luis Angel. "Sterile Neutrino Searches." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103875.

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In the first part of the thesis we explore the sensitivity to sterile neutrinos by using a novel kaon tagging technology: ENUBET, the proposed experiment could decisively test indications from the experiments Neutrino-4 and IceCube. In the second part of the thesis we discuss the current status of sterile neutrino searches at nuclear reactors, we present a study with the optimization of a green field, two baseline reactor experiment with respect to the sensitivity for electron anti-neutrino disappearance in search of a light sterile neutrino at both research and commercial reactors. We find that a total of 5 tons of detectors deployed at a commercial reactor with a closest approach of 25 m can probe the mixing angle sin 2 2θ down to ∼ 5 × 10 −3 around ∆m 2 ∼ 1 eV 2 . The same detector mass deployed at a research reactor can be sensitive up to ∆m 2 ∼ 20 − 30 eV 2 assuming a closest approach of 3 m and excellent energy resolution, such as that projected for TAO. We also find that lithium doping of the reactor could be effective in increasing the sensitivity for higher ∆m 2 values.
Master of Science
A sterile neutrino is a particle that is not included in the actual content of matter at the fundamental level. Our goal in this thesis was to search for an imprint of this particle at neutrino experiments. We performed numerical simulations using the experimental specification given in the literature to predict what this signal should look like. The importance of searching for this particle arises from indications at neutrino nuclear experiments, if this particle exists, that would imply new physics beyond our actual understanding of the matter content in the universe. The first search was performed at an experimental facility called ENUBET and the second search was performed at nuclear reactors. Testing this elusive particle means we need to determine two parameters from a model. The results of the aforementioned parameter space searches are presented in this thesis. The statistical significance in our findings is not entirely conclusive to either confirm or refute the sterile neutrino. The benefits of studying neutrinos at nuclear reactors is that they are produced in generating electrical power as well as monitoring nuclear weapons.
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Miknaitis, Kathryn Kelly Schaffer. "A search for matter enhanced neutrino oscillations through measurements of day and night solar neutrino fluxes at the Sudbury Neutrino Observatory /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/9636.

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Tsang, Ka-vang. "A search for periodic neutrino signals and gamma-ray burst neutrinos with the Sudbury Neutrino Observatory." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B3194324X.

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Tsang, Ka-vang, and 曾嘉宏. "A search for periodic neutrino signals and gamma-ray burst neutrinos with the Sudbury Neutrino Observatory." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B3194324X.

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Iyer, Sharada Ramalingham. "A novel approach in the detection of muon neutrino to tau neutrino oscillation from extragalactic neutrinos." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/290068.

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A novel approach is proposed for studying the ν(μ) → ν(τ) oscillation and detection of extragalactic neutrinos. Active Galactic Nuclei (AGN), Gamma Ray Bursters (GRB) and Topological Defects are believed to be sources of ultrahigh energy ν(μ) and νₑ. These astrophysical sources provide a long baseline of 100Mpc, or more, for possible detection of ν(μ) → ν(τ) oscillation with mixing parameter Δm² down to 10⁻¹⁷ eV², many orders of magnitude below the current accelerator experiments. The propagation characteristics of upward going muon and tau neutrinos is studied to show that high energy tau neutrinos cascade down in energy as they propagate through the Earth, producing an enhancement of the incoming tau neutrino flux in the low energy region. By contrast, high energy muon neutrinos get attenuated as they traverse the Earth. It is observed that the relative steepness of the incoming neutrino flux spectrum and the nadir angle of the Earth are two important factors that influence the enhancement and cascade of nutau flux. This effect provides a novel way to search for tau neutrino appearance by measuring the angular dependence of tau neutrino induced upward muons; and upward hadronic and electromagnetic showers. A Monte Carlo evaluation of tau survival probability and its range shows that at energies below 10⁷ - 10⁸ GeV, depending on the material, only tau decays are important. However, at higher energies the tau energy losses are significant, hence reducing the survival probability of tau. Here, tau energy loss for energies up to 10⁹ GeV have been calculated taking into consideration the decay of tau. An understanding of tau energy loss at very high energies could help with the interpretation of long tracks produced by charged particles in large underground detectors.
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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.

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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
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Lyon, Matthew Jeremy. "Neutron transport in the Sudbury neutrino detector." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337422.

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

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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.
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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.

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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
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Books on the topic "Neutrino"

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

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1930-, Winter Klaus, ed. Neutrino physics. 2nd ed. Cambridge, UK: Cambridge University Press, 2000.

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Neutrino astrophysics. Cambridge [England]: Cambridge University Press, 1989.

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

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Close, Frank. Neutrino. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4.

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Kojović, Peđa. Neutrino. Sarajevo: Naklada Zoro, 2007.

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Henny, Hassebroek, and Uijen, Aat van (Adriaan Johan), 1948-, eds. Neutrino. Diemen: Veen Magazines, 2012.

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

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B, Pal P., ed. Massive neutrinos in physics and astrophysics. Singapore: World Scientific, 1991.

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B, Pal P., ed. Massive neutrinos in physics and astrophysics. 3rd ed. River Edge, N.J: World Scientific, 2004.

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Book chapters on the topic "Neutrino"

1

Close, Frank. "Ein verzweifelter Ausweg." In Neutrino, 1–24. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_1.

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Close, Frank. "Extragalaktische NeutrinosNeutrinos." In Neutrino, 175–98. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_10.

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Close, Frank. "Ein Blick zurück." In Neutrino, 199–217. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_11.

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Close, Frank. "Das Unsichtbare sichtbar machen." In Neutrino, 25–37. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_2.

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Close, Frank. "Der Hauptgewinn." In Neutrino, 39–55. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_3.

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Close, Frank. "Scheint die Sonne noch?" In Neutrino, 57–76. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_4.

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Close, Frank. "Mit wie vielen NeutrinosNeutrinos scheint die Sonne?" In Neutrino, 77–92. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_5.

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Close, Frank. "Physik im Untergrund." In Neutrino, 93–111. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_6.

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Close, Frank. "Erst eins, dann zwei, dann drei." In Neutrino, 113–37. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_7.

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Close, Frank. "Es fehlen noch mehr NeutrinosNeutrinos." In Neutrino, 139–54. Heidelberg: Spektrum Akademischer Verlag, 2012. http://dx.doi.org/10.1007/978-3-8274-2941-4_8.

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Conference papers on the topic "Neutrino"

1

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

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Sutton, Andrew. "The Accelerator Neutrino Neutron Interaction Experiment." In The Accelerator Neutrino Neutron Interaction Experiment. US DOE, 2023. http://dx.doi.org/10.2172/1997128.

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

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NARDI, E. "MEASURING NEUTRINO MASSES WITH SUPERNOVA NEUTRINOS." In 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.

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López-Pavón, Jacobo, Daniel Kaplan, Maury Goodman, and Zack Sullivan. "Sterile neutrinos at a Neutrino Factory." In 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.

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

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YAKOVLEV, D. G., M. E. GUSAKOV, A. D. KAMINKER, and A. Y. POTEKHIN. "NEUTRINO EMISSION FROM NEUTRON STARS." In Proceedings of the Carpathian Summer School of Physics 2005. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812772862_0024.

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Sutton, Andrew. "ANNIE: the Accelerator Neutrino Neutron Interaction Experiment." In ANNIE: the Accelerator Neutrino Neutron Interaction Experiment. US DOE, 2023. http://dx.doi.org/10.2172/2008080.

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Zhou, Shun. "Relic Right-handed Dirac Neutrinos and Cosmic Neutrino Background." In Neutrino Oscillation Workshop. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.283.0088.

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PAKVASA, SANDIP. "NEUTRINO PROPERTIES FROM HIGH ENERGY ASTROPHYSICAL NEUTRINOS." In Proceedings of the 10th International Symposium. World Scientific Publishing Company, 2005. http://dx.doi.org/10.1142/9789812701756_0019.

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Reports on the topic "Neutrino"

1

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

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

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Fallot, M., B. Littlejohn, and Paraskevi Dimitriou. Antineutrino spectra and their applications. IAEA Nuclear Data Section, July 2019. http://dx.doi.org/10.61092/iaea.e4zk-7ryk.

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Abstract:
A summary is given of a Technical Meeting assembled to review the status-of-affairs in experiments, models and nuclear data associated with the determination of the anti-neutrino flux and spectrum as produced by reactor neutrinos. Participants discussed the latest experimental results in measurements and models and recommended future improvements in the data analysis, nuclear model corrections and nuclear decay data. There was overall consensus that the field of reactor neutrinos would benefit from international coordination in the form of an international working group. Details of the discussions and the proposed actions are presented in this summary report.
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Pershing, Teal Joel. The Accelerator Neutrino-Neutron Interaction Experiment. Office of Scientific and Technical Information (OSTI), January 2020. http://dx.doi.org/10.2172/1638651.

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Qian, Yong-Zhong, and G. M. Fuller. Neutrino-neutrino scattering and matter-enhanced neutrino flavor transformation in supernovae. Office of Scientific and Technical Information (OSTI), August 1994. http://dx.doi.org/10.2172/10177886.

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Parke, Stephen J. International Neutrino Commission Report & Neutrino 2018. Office of Scientific and Technical Information (OSTI), June 2018. http://dx.doi.org/10.2172/1460783.

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Avvakumov, Sergey E. Search for muon neutrino (anti-muon neutrino) ---> electron neutrino (anti-electron neutrino) oscillations in the E815 (NuTeV) fixed target neutrino experiment at Fermilab. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/1420960.

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Kamyshkov, Yuri, and Thomas Handler. Neutrino Interactions. Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1329518.

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Marino, Alysia. Probing Neutrino Properties with Long-Baseline Neutrino Beams. Office of Scientific and Technical Information (OSTI), June 2015. http://dx.doi.org/10.2172/1294499.

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Akhmedov, E. Kh. Neutrino magnetic moments and the solar neutrino problem. Office of Scientific and Technical Information (OSTI), August 1994. http://dx.doi.org/10.2172/10177402.

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