Дисертації з теми "Dark-matter search"
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Cozzini, Cristina. "CRESST dark matter search with cryogenic calorimeters." Diss., [S.l.] : [s.n.], 2003. http://edoc.ub.uni-muenchen.de/archive/00001299.
Повний текст джерелаStark, Schneebeli Luisa Sabrina. "Indirect dark matter search with the Magic telescope /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17389.
Повний текст джерелаPetricca, Federica. "Dark Matter Search with Cryogenic Phonon-Light Detectors." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-37308.
Повний текст джерелаMarchese, J. T. "Background studies for the CRESST dark matter search." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365695.
Повний текст джерелаNavrer-Agasson, Anyssa. "Direct dark matter search with the DarkSide Experiment." Thesis, Université de Paris (2019-....), 2019. https://theses.md.univ-paris-diderot.fr/NAVRER-AGASSON_Anyssa_va2.pdf.
Повний текст джерелаThe existence of dark matter is known because of its gravitational effects, and although its nature remains undisclosed, one of the leading candidate is the weakly interacting massive particle (WIMP) with mass of the order of 100 GeV/c2 and coupling with ordinary matter at or below the weak scale. In this context, DarkSide-50 aims to direct observe WIMP-nucleon collisions in a liquid argon dual phase time-projection chamber located deep underground at Gran Sasso National Laboratory, in Italy. This work first details the argon calibration realised by the ARIS experiment. ARIS characterised the argon response to low energy nuclear and electronic recoils, down to unprecedented energies. The nuclear quenching was measured with the best precision to this date, and the recombination probability extracted was compared to different models describing the behaviour of argon in presence of an electric field. A search for low mass WIMPs performed with DarkSide-50 data is also presented. This search focuses on the ionisation signal from the TPC, leading much to much lower detection threshold. The achieved exclusion limits are amongst the leading ones, and the most stringent for a liquid argon target. Finally a preliminary search for axions is presented. Axions are an alternative candidate to dark matter, proposed as a solution to the strong CP problem. They are detectable in DarkSide via their coupling to electrons. This search required the improvement of the modelling of the background sources, by taking into account atomic effects in beta emission spectra, as well as a redefinition of the energy scale converting the energy deposited into a number of extracted electrons. The results presented show an encouraging sensitivity to both solar and galactic axions
GENTILE, VALERIO. "Directional dark matter search with the NEWSdm experiment." Doctoral thesis, Gran Sasso Science Institute, 2019. http://hdl.handle.net/20.500.12571/9706.
Повний текст джерелаKeeling, Robert Owen. "Studies of scintillators for the CRESST dark matter search." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270270.
Повний текст джерелаScovell, Paul Robert. "Results from the ZEPLIN-III dark matter search experiment." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/9592.
Повний текст джерелаCharif, Mohamad-ziad. "Indirect search for dark matter with the Antares telescope." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4113/document.
Повний текст джерелаThe early history of modern physics have been full of problems fixed with un-orthodox yet brilliant solutions. From the Hydrogen electron orbit, black bodyradiation and the ultraviolet catastrophe, to the perihelion precession of Mercury.Quantum Mechanics and General Relativity not only solved these problems butthey opened the path to new observations and predictions about the Universe welive in and the introduction of new problems to be solved.One of the more modern problems we are facing today in physics is the largediscrepancy among measurements of the visible mass in the Universe and the pre-dictions of laws of gravity. An indisputable mass of evidence from different partsof observational cosmology is showing again and again that the observed lumi-nous mass in the Universe constitutes a tiny fraction of the matter that actuallyexists. The proposed solutions of this problem comes in two completely differentflavors. One proposed solution is that the laws of gravity are not the same in thelimit of tiny accelerations. Theories of modified gravitational dynamics proposea non-linear term in Newton law of gravity that becomes relevant at small accel-erations which in turn can explains the missing matter. The other solution to themissing matter is the introduction of new type of matter that does not interact withlight, making it invisible yet inferred to exist by its gravitational effect. The newmatter becomes a new elementary particle to be added to list of already knownelementary particles. While there are many candidates to this new elementaryparticle the favored one is called a WIMP or Weakly Interacting Massive Particle
Agnes, Paolo. "Direct search for dark matter with the DarkSide experiment." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC279/document.
Повний текст джерелаA wide range of observational evidence suggests that the matter content of the Universe is dominated by a non-baryonic and non-luminous component: dark matter. One of the most favored candidate for dark matter is a big-bang relic population of Weakly Interacting Massive Particles (WIMPs). The DarkSide program aims to the direct detection of WIMPs with a dual-phase liquid argon TPC and a background free exposure. The first phase of the experiment, DarkSide-50, is running since Oct 2013 and has (46 ± 0.7) kg active mass. A first run, with an atmospheric argon fill (AAr), provided the most sensitive limit ever obtained by an argon-based experiment. The current run, with an underground argon fill (UAr, depleted in Ar-39), represents a milestone towards the construction of DarkSide-20k, a low-background dual-phase TPC with a fiducial mass of 20 t. This work is been mainly devoted to the description of G4DS, the DarkSide Monte Carlo simulation, and to its applications. G4DS is a GEANT4-based simulation, it provides the geometry description of each detector of the DarkSide program, it is tuned to reproduce the DarkSide-50 response at the percent level and incorporates a custom model for ionization and scintillation mechanisms in liquid argon, tuned on real data. The principal applications of the simulation include the estimate of the neutron and gamma backgrounds for DarkSide-50, the measurement of the Ar-39 depletion factor in UAr with respect to AAr and the design studies for DarkSide-20k
Masi, Nicolò <1985>. "The AMS-02 Experiment and the Dark Matter Search." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5179/1/Masi_Nicolo_tesi.pdf.
Повний текст джерелаMasi, Nicolò <1985>. "The AMS-02 Experiment and the Dark Matter Search." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5179/.
Повний текст джерелаLAI, MICHELA. "Dark matter search and neutrino physics in Liquid Argon." Doctoral thesis, Università degli Studi di Cagliari, 2021. http://hdl.handle.net/11584/308084.
Повний текст джерелаMcCarthy, Keven (Kevin Ahmad). "Detector simulation and WIMP search analysis for the Cryogenic Dark Matter Search experiment." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/83642.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 370-388).
Astrophysical and cosmological measurements on the scales of galaxies, galaxy clusters, and the universe indicate that ~85% of the matter in the universe is composed of dark matter, made up of non-baryonic particles that interact with cross-sections on the weak scale or lower. Hypothetical Weakly Interacting Massive Particles, or WIMPs, represent a potential solution to the dark matter problem, and naturally arise in certain Standard Model extensions. The Cryogenic Dark Matter Search (CDMS) collaboration aims to detect the scattering of WIMP particles from nuclei in terrestrial detectors. Germanium and silicon particle detectors are deployed in the Soudan Underground Laboratory in Minnesota. These detectors are instrumented with phonon and ionization sensors, which allows for discrimination against electromagnetic backgrounds, which strike the detector at rates orders of magnitude higher than the expected WIMP signal. This dissertation presents the development of numerical models of the physics of the CDMS detectors, implemented in a computational package collectively known as the CDMS Detector Monte Carlo (DMC). After substantial validation of the models against data, the DMC is used to investigate potential backgrounds to the next iteration of the CDMS experiment, known as SuperCDMS. Finally, an investigation of using the DMC in a reverse Monte Carlo analysis of WIMP search data is presented. 140.23 kg-days of WIMP search data from the silicon detectors in the CDMSII experiment is also analyzed. The resulting upper limits on the WIMP-nucleon crosssection are higher than those published by other experiments at all WIMP masses, and the lowest limit on the WIMP-nucleon cross-section is 1.07*10-42 cm2 at a mass of 60 GeV/c2. These results do provide new and interesting constraints at WIMP masses <40 GeV/c2 and cross sections from 10-42 - 10-39 cm2, a region in which some WIMP search experiments have claimed evidence for a WIMP signal, which other experiments claim to have ruled out.
by Kevin McCarthy.
Ph.D.
Arnauth, Pela Joao Pela. "Search for Higgs decay to dark matter and trigger studies." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/40432.
Повний текст джерелаHenry, S. A. "The 66-channel readout for the CRESST dark matter search." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400137.
Повний текст джерелаMaggio, Camilla. "Indirect Search for WIMP Dark Matter with the MAGIC Telescopes." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/671998.
Повний текст джерелаLa naturaleza de la materia oscura (DM) en el universo sigue siendo un enigma a día de hoy a pesar los esfuerzos de la comunidad científica. Entre las partículas candidatas más allá del modelo estándar de física de partículas destaca la Weakly Interacting Massive Particle (WIMP) como una de las más prometedoras. Su masa se estima entre pocos GeV y cientos de TeV, encajando perfectamente en el intervalo de energías testeadas para la búsqueda indirecta de la materia oscura. Los telescopios MAGIC, situados en el Observatorio del Roque de los Muchachos en la isla canaria de La Palma, realizan búsquedas indirectas de WIMP desde que entraron en operación. Los objetos observados más comunes para tal fin son las galaxias esferoidales enanas (dSphs) satélites de la Vía Láctea y el centro galáctico y su halo. En esta tesis presento el resultado de las búsquedas indirectas de aniquilación de WIMPs en tres diferentes objetos de observación (el cúmulo globular M15 y las dSphs Draco y Coma Berenices) así como los resultados obtenidos a partir de la combinación de los datos de las dos dSphs estudiadas y dos dSphs analizadas previamente dentro de la colaboración MAGIC. No se ha encontrado ninguna señal en cualquiera de los 4 estudios. El estudio de M15 ha constituido un reto debido al modesto exceso de densidad de DM supuesto en este tipo de objetos y las grandes incertidumbres asociadas a los perfiles de dispersión de la velocidad de las estrellas en sus centros. Para obtener una estimación de las sensibilidades que se pueden obtener en este tipo de análisis, se han considerado cuatro diferentes perfiles de densidad de DM de M15. Se han obtenido límites superiores estadísticos sobre el promedio de la sección eficaz de aniquilación de WIMPs multiplicada por la velocidad (en adelante velocity-averaged cross-section) considerando los perfiles de densidad de DM proporcionados en los trabajos de H.E.S.S. y VERITAS. Los resultados obtenidos son compatibles con los presentados por sus respectivas publicaciones. Adicionalmente, se han encontrado límites superiores de prueba considerando perfiles de densidad de DM obtenidos a partir de la convolución del perfil de densidad de M15 y de su contenido de materia no bariónica en un escenario de un cuerpo dominado por DM. Los límites obtenidos con este método son mejores que los que se obtienen con las más prometedoras dSphs, pero al mismo tiempo son poco realistas y proporcionan solamente un valor mínimo de la velocity-averaged cross-section alcanzable en M15, a la espera de nuevas medidas cinemáticas en sus partes centrales. Las dSphs Draco y Coma Berenices han sido observadas con los telescopios MAGIC dentro de una campaña de diversificación de fuentes de observación plurianual. Se han obtenido límites superiores realistas con un 95% de nivel de confianza en la velocity-averaged cross-section de WIMPs. La combinación de los datos de estas dos dSphs con los de las otras dos dSphs anteriormente observadas con MAGIC (Segue 1 y Ursa Major II) ha permitido mejorar la sensibilidad en la búsqueda indirecta de aniquilación de WIMPs. Los resultados obtenidos constituyen el legado de la colaboración MAGIC en este campo, y son los más restrictivos alcanzados en MAGIC y los más estrictos en el intervalo de masa de WIMP ~10-100 TeV en las búsquedas en astrofísica de rayos gamma, llegando a límites superiores del orden de 10⁻²⁴ cm³/s sobre la velocity-averaged cross-section con un nivel de confianza del 95%. En la última parte de la tesis se presenta mi contribución al desarrollo y puesta a punto del Barcelona Raman LIDAR, un instrumento avanzado y no comercial optimizado para la monitorización de la atmósfera encima del Cherenkov Telescope Array.
The nature of Dark Matter (DM) in the Universe is still an enigma at present day, despite the efforts of the scientific community. Among the favorite DM particle candidates beyond the Standard Model of particle physics, the Weakly Interacting Massive Particle (WIMP) is of the most promising. Predicted to have a mass between few GeV and hundreds of TeV, it fits perfectly in the energy range tested by indirect dark matter searches with Imaging Atmospheric Cherenkov Telescopes. The MAGIC telescopes, located at the Observatorio del Roque de los Muchachos, on the Canary Island of La Palma, perform indirect DM searches for WIMPs since their very beginning. Among the targets observed, dwarf spheroidal satellite galaxies (dSphs) and the Galactic Center and halo are the most common, both expected to be embedded in a high DM overdensity. In this thesis I present the outcome of indirect WIMP annihilation searches from three different observation targets (the globular cluster M15 and the dSphs Draco and Coma Berenices) together with the results obtained by a combination of data from the two dSphs studied in this thesis and two dSphs previously analyzed by the MAGIC collaboration. No signal has been observed in any of the four searches. The study of M15 has been a challenge due to its relatively low DM overdensity predicted and the large systematic uncertainties resulting from the current lack of star velocity dispersion profiles at its core. In order to get an estimate of the sensitivities achievable with this type of analyses, four different realizations of the M15 DM density profile were investigated. Statistical upper limits on the velocity-averaged WIMP annihilation cross-section have been obtained with the use of the DM profiles provided by the H.E.S.S. and VERITAS experiments. The results obtained are compatible with those presented in their respective publications. Further toy statistical upper limits have been obtained taking into account DM density profiles from a convolution of the M15 density profile and its expected non-baryonic matter content in a scenario of DM domination. The limits retrieved with this method are better than the most promising ones from dSphs, but at the same time systematically unreliable, and provide only a minimum value of the velocity-averaged cross-section attainable in M15, awaiting for new kinematic measurements at globular clusters cores. The dSphs Draco and Coma Berenices were observed during the past years with the MAGIC telescopes within a multi-year diversification campaign. Reliable 95% CL upper limits on the velocity-averaged WIMP annihilation cross-section have been retrieved and are presented in this thesis. The data of these two dSphs are also combined with the ones of the two other dSphs previously observed with the MAGIC telescopes, namely Segue 1 and Ursa Major II, to achieve the best sensitivity for indirect WIMP DM annihilation searches. The results obtained constitute the MAGIC collaboration legacy in this field, and are the most constraining reached by MAGIC and the most stringent in the ~ 10-100 TeV WIMP DM mass interval in gamma-ray astrophysics searches so far, reaching upper limits of the order of 10⁻²⁴ cm³/s for the velocity-averaged cross-section. In the last part of this thesis, I present my contribution to the development and set up of the Barcelona Raman LIDAR, an advanced and no commercial instrument optimized for the atmospheric monitoring above the future Cherenkov Telescope Array.
Universitat Autònoma de Barcelona. Programa de Doctorat en Física
Wikström, Gustav. "A search for solar dark matter with the IceCube neutrino telescope." Doctoral thesis, Stockholms universitet, Fysikum, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-27352.
Повний текст джерелаFour articles are appended to the thesis:I. G. Wikström for the IceCube collaboration, Proc. of the 30th ICRC,arXiv/0711.0353 [astro-ph] (2007) 135.II. A. Gross, C. Ha, C. Rott, M. Tluczykont, E. Resconi, T. DeYoung and G. Wikström for the IceCube Collaboration, Proc. of the 30th ICRC,arXiv/0711.0353 [astro-ph] (2007) 11.III. G. Wikström and J. Edsjö, JCAP 04 (2009) 009.IV. R. Abbasi et al. (IceCube collaboration), accepted for publication in Phys. Rev. Lett., arXiv/0902.2460v3 [astro-ph.CO] (2009).
IceCube
Minaeva, Yulia S. "Search for neutralino dark matter with the AMANDA-II neutrino telescope /." Stockholm : Fysikum, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-137.
Повний текст джерелаImber, J. E. "New Electronics and Results from the CRESST-II Dark Matter Search." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526067.
Повний текст джерелаMouton, Frederic. "Background simulations and WIMP search with galactic signature dark matter experiments." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/20071/.
Повний текст джерелаHertel, Scott A. (Scott Alexander). "Advancing the search for dark matter : from CDMS II to SuperCDMS." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/79517.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 285-294).
An overwhelming proportion of the universe (83% by mass) is composed of particles we know next to nothing about. Detecting these dark matter particles directly, through hypothesized weak-force-mediated recoils with nuclear targets here on earth, could shed light on what these particles are, how they relate to the standard model, and how the standard model fits within a more fundamental understanding. This thesis describes two such experimental efforts: CDMS 11 (2007-2009) and SuperCDMS Soudan (ongoing). The general abilities and sensitivities of both experiments are laid out, placing a special emphasis on the detector technology, and how this technology has evolved from the first to the second experiment. Some topics on which I spent significant efforts are described here only in overview (in particular the details of the CDMS II analysis, which has been laid out many times before), and some topics which are not described elsewhere are given a somewhat deeper treatment. In particular, this thesis is hopefully a good reference for those interested in the annual modulation limits placed on the low-energy portion of the CDMS II exposure, the design of the detectors for SuperCDMS Soudan, and an overview of the extremely informative data these detectors produce. It is an exciting time. The technology I've had the honor to work on the past few years provides a wealth of information about each event, more so than any other direct detection experiment, and we are still learning how to optimally use all this information. Initial tests from the surface and now underground suggest this technology has the background rejection abilities necessary for a planned 200kg experiment or even ton-scale experiment, putting us on the threshold of probing parameter space orders of magnitude from where the field currently stands.
by Scott A. Hertel.
Ph.D.
McGowan, Richard. "Data analysis and results of the upgraded CRESST dark matter search." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:c5299add-8aa2-4633-9fd6-3ab05ec84e89.
Повний текст джерелаEhrlich, Ralf. "The search for neutralino dark matter with the AMANDA neutrino telescope." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/9224.
Повний текст джерелаThesis research directed by: Dept. of Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Nishimura, Hironobu. "Direction-sensitive direct dark matter search experiment with a gaseous TPC." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/124415.
Повний текст джерелаMalhan, Khyati. "Stellar streams as probes of dark matter : search and dynamical analysis." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAE027/document.
Повний текст джерелаTidal stellar streams are pristine star structures that play central role in addressing long standing mysteries of the Galactic archaeology. Since streams are orbital in nature, they inherently possess the characteristics of unravelling the underlying mass distribution of the galaxy, and can be used to probe the shape of the dark matter halo. Besides testing the ‘hierarchical merging’ scenario of galaxy formation, stream gaps can also provide indirect evidence for the existence of dark matter sub-halos (thereby, in principle, constraining the nature of the dark matter particle itself). Due to all these reasons, the dynamical analysis of stellar streams of the Milky Way Galaxy naturally becomes one of the interesting problems. However, the foremost challenge is to detect these structures. During the thesis, STREAMFINDER algorithm (a state of the art algorithm) was designed to systematically process the Gaia dataset (ESA’s novel astrophysical catalogue containing unprecedented astrometric solutions of over 1.6 billion stars) for the detection of the stellar streams of the Milky Way. This hefty endeavour led to the detection of 10 high confidence stream structures, of which 5 were reported as new discoveries.This harvest of structures also facilitated, for the first time, creation of a panoramic structural and kinematic map of the stellar streams of the Milky Way halo, taking our community a step further in unravelling the complex formation history of our Galaxy. This project was instantly followed by the orbital analysis of one of the detected streams (namely GD-1) to explore the improvements in the gravitational potential models of our Galaxy. The constraints on the Milky Way’s mass and that on the shape of its dark matter halo, that were obtained by simply employing this single stream, revealed the potential power the analysis of an ensemble of streams would hold in in probing the overall galactic mass distribtuion of our Galaxy. Thereby, the thesis paved way for new discoveries of the stellar substructures, also highlighting the future prospects in this field
Rinchiuso, Lucia. "Study of the Galactic Center and dark matter search with H.E.S.S." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS180/document.
Повний текст джерелаThe H.E.S.S. (High Energy Spectroscopic System) experiment is an array of five Cherenkov telescopes that observe the sky in gamma-rays from about 100 GeV up to several ten TeV.Gamma rays are produced in violent non-thermal phenomena in the Universe in the neighborhood of pulsars, supernovae, black holes, ..., and could also be produced by the annihilation of dark matter particles.Numerous cosmological and astrophysical probes suggest that 85% of the total matter budget in the Universe is of unknown origin. This component of matter known as dark matter is non baryonic and could consist of yet undiscovered particles which privileged candidates are arguably massive particles with electroweak couplings with ordinary matter (WIMPs).Dark matter particles may annihilate into Standard Model particles in dense regions of the Universe. Among the annihilation products are photons which detection at high energy with ground-based Cherenkov telescopes could bring unique information on the nature of the dark matter.H.E.S.S. observes dark-matter-dense regions of the sky such as the Galactic Center and dwarf galaxy satellites of the Milky Way. A study on the interpretation of an excess of gamma-rays detected by H.E.S.S. at the Galactic Center in terms of acceleration of protons by a population of unresolved millisecond pulsars is performed.10 years of observations of the Galactic Center with the four-telescope H.E.S.S.-I array, five years of data taking towards the Galactic Center region with the full H.E.S.S.-II array and a two-years dataset towards newly discovered dwarf spheroidal galaxies are analyzed. The search for dark matter annihilation signals towards these targets provided the strongest limits so far on dark matter annihilation cross section in gamma rays of TeV energies. The potential of dark matter detection with the upcoming Cherenkov Telescope Array (CTA) towards the inner Galactic halo are studied. They may annihilate into Standard Model particles in dense regions of the Universe. Among the annihilation products are high energy photons. The detection of these photons with ground-based Cherenkov telescopes may reveal the nature of the dark matter. H.E.S.S. have observed some dark-matter-dense regions of the sky likethe Galactic Center and dwarf galaxies satellites of the Milky Way. In this work 10 years of observations of the Galactic Center with the four-telescopes H.E.S.S.-I array, five years of data taking towards the Galactic Center region with the full H.E.S.S.-II array and a two-years dataset towards newly discovered dwarf spheroidal galaxies are analyzed. The searches for dark matter annihilation signals towards these targets produced the strongest limits so far on dark matter annihilation cross section in gamma rays of TeV energies.Perspectives of dark matter detection with the future array CTA (Cherenkov Telescope Array) towards the inner Galactic halo are also discussed. A study on the interpretation of an excess of gamma-rays detected by H.E.S.S. at the Galactic Center in terms of acceleration of protons by a population of unresolved millisecond pulsars complements the dark matter searches
Hallsjö, Sven-Patrik. "Search for Dark Matter in the Upgraded High Luminosity LHC at CERN : Sensitivity of ATLAS phase II upgrade to dark matter production." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-107583.
Повний текст джерелаLuca, M. "Sapphire scintillation tests for cryogenic detectors in the EDELWEISS dark matter search." Phd thesis, Université Claude Bernard - Lyon I, 2007. http://tel.archives-ouvertes.fr/tel-00182326.
Повний текст джерелаAfter having shown that sapphire had interesting characteristics for building heat-scintillation detectors, we have tested if using a sapphire detector was feasible within a dark matter search. During the first commissioning tests of EDELWEISS II, we have proved the compatibility between a sapphire heat-scintillation detector and the experimental setup.
Engdegård, Olle. "A Search for Dark Matter in the Sun with AMANDA and IceCube." Doctoral thesis, Uppsala universitet, Högenergifysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160833.
Повний текст джерелаIceCube
Scorza, Silvia. "EDELWEISS-II, direct Dark Matter search experiment : first data analysis and results." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00561621.
Повний текст джерелаLarsen, Nicole A. "An Effective Field Theory Analysis of the First LUX Dark Matter Search." Thesis, Yale University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10160866.
Повний текст джерелаA wealth of astrophysical research supports the existence of dark matter in the universe, yet the exact identity and nature of this unknown particle remain elusive. The Weakly Interacting Massive Particle (WIMP), one of the most promising dark matter candidates, is thought to interact with Standard Model particles only through the gravitational and weak nuclear forces. The Large Underground Xenon (LUX) experiment is one of a large number of experiments that seek to detect WIMPs through their rare but discernible scatters off of target nuclei. Specifically, LUX is a 370-kg dual-phase xenon-based time projection chamber (TPC) that operates by detecting light and ionization signals from particles incident upon a xenon target. The first part of this dissertation details the design of the LUX experiment and describes several novel hardware subsystems that allow LUX to detect extremely rare events with high precision. With the 2013 release of the world's first sub-zeptobarn spin-independent WIMP-nucleon cross section limit, the LUX (Large Underground Xenon) experiment has emerged as a frontrunner in the field of dark matter direct detection.
However, tension between experiments and the absence of a definitive positive detection suggest it would be prudent to search for answers outside the standard spin-independent/spin-dependent analyses. hi particular, the standard analyses neglect momentum- and velocity-dependent interactions on the grounds that WIMP-nucleus collisions are nonrelativistic. At the parton level, this is not always the case, and moreover, models exist in which the standard spin-independent and spin-dependent interactions are subdominant to new kinds of interactions. Recent theoretical work has identified a complete set of 14 possible independent WIMP-nucleon interactions using basic symmetries and an effective field theory formulation. These interactions produce not only spin-independent and spin-dependent nuclear responses but also novel nuclear responses such as angular-momentum-dependent and spin-orbit couplings. In the second portion of this dissertation we report on the extension of the LUX analysis to search for all 14 of these operators, we comment on the possible suppression of event rates due to operator interference, and we show that under this new framework, LUX again exhibits world-leading sensitivity.
Luca, Melisa. "Sapphire scintillation tests for cryogenic detectors in the EDELWEISS dark matter search." Lyon 1, 2007. http://tel.archives-ouvertes.fr/docs/00/18/23/26/PDF/thesisluca.pdf.
Повний текст джерелаNakamura, Kiseki. "Direction-sensitive dark matter search with a gaseous micro time projection chamber." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188485.
Повний текст джерелаWang, Gensheng. "The Cryogenic Dark Matter Search and Background Rejection with Event Position Information." Case Western Reserve University School of Graduate Studies / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=case1093479556.
Повний текст джерелаSander, Aaron J. "The Search for Dark Matter in the Milky Way Halo with Fermi." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276870932.
Повний текст джерелаEdwards, Blair Nicholas Victor. "The ZEPLIN dark matter search : two phase xenon as a WIMP target." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/5540.
Повний текст джерелаDuffy, Leanne Delma. "High resolution search for dark matter axions in Milky Way halo substructure." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0015694.
Повний текст джерелаLuca, Melisa Stern-Jacquin Martine. "Sapphire scintillation tests for cryogenic detectors in the EDELWEISS dark matter search." [s.l.] : [s.n.], 2007. http://tel.archives-ouvertes.fr/docs/00/18/23/26/PDF/thesisluca.pdf.
Повний текст джерелаBusoni, Giorgio. "Dark Matter Indirect Detection and Collider Search: the Good and the Bad." Doctoral thesis, SISSA, 2015. http://hdl.handle.net/20.500.11767/3909.
Повний текст джерелаShcherbakova, Anna. "Calibration of b-tagging and search for Dark Matter : Calibration of b-tagging efficiency and search for Dark Matter production in association with heavy flavour quarks with the ATLAS experiment." Doctoral thesis, Stockholms universitet, Fysikum, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-146034.
Повний текст джерелаBelloli, Nicoletta. "Study of cosmic nuclei fluxes with AMS-02: implication for dark matter search." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7582/.
Повний текст джерелаSchmaler, Jens Michael [Verfasser]. "The CRESST Dark Matter Search – New Analysis Methods and Recent Results / Jens Schmaler." München : Verlag Dr. Hut, 2010. http://d-nb.info/1009972839/34.
Повний текст джерелаKéfélian, Cécile. "Search for dark matter with EDELWEISS-III excluding background from muon-induced neutrons." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1020/document.
Повний текст джерелаThe aim of the EDELWEISS-III experiment is to detect the elastic scattering of WIMPs from the galactic dark matter halo on germanium bolometers. The most problematic background arises from neutrons, which can mimic a WIMP interaction in a detector. Neutrons are notably induced by high energy cosmic ray muons reaching the underground laboratory despite the 4800 m w.e. of rock overburdened. Remaining muons are tagged using an active muon-veto system of 46 plastic scintillator modules surrounding the experiment, which allows to reject most of the associated background. The goal of this thesis was to give a precise estimation of the irreducible muon-induced neutron background, needed to identify a potential WIMP signal. The expected background depends on the geometry of the experiment as well as on the used materials, both strongly modified since EDELWEISS-II. Geant4-based simulations of muons through the modified geometry were performed to derive the rate of events induced by muons in the bolometer array. This rate has been shown to be in good agreement with the measured one extracted from the Run308 data. In parallel, a lower limit on the muon-veto efficiency was derived using bolometer data only. A new method based on an AmBe source was developed to extract precisely the detection efficiency of individual modules from the simulation. From these results, it was shown that the expected background is negligible for the WIMP search analyses performed with the Run308 data and won't limit the future sensitivity of the EDELWEISS-III experiment
Burgess, Thomas. "A Search for Solar Neutralino Dark Matter with the AMANDA-II Neutrino Telescope." Doctoral thesis, Stockholm : Physics Department, Stockholm University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7378.
Повний текст джерелаSchipperges, Vincent Paul Hsien-Shih [Verfasser]. "Non-Standard Search for Dark Matter with CRESST / Vincent Paul Hsien-Shih Schipperges." Tübingen : Universitätsbibliothek Tübingen, 2020. http://d-nb.info/1219903655/34.
Повний текст джерелаSchipperges, Vincent [Verfasser]. "Non-Standard Search for Dark Matter with CRESST / Vincent Paul Hsien-Shih Schipperges." Tübingen : Universitätsbibliothek Tübingen, 2020. http://d-nb.info/1219903655/34.
Повний текст джерелаPasuwan, Patrawan. "Measurements of luminosity and a search for dark matter in the ATLAS experiment." Licentiate thesis, Stockholms universitet, Fysikum, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-193096.
Повний текст джерелаHennings-Yeomans, Raul. "First 5 Tower WIMP-search Results from the Cryogenic Dark Matter Search with Improved Understanding of Neutron Backgrounds and Benchmarking." Case Western Reserve University School of Graduate Studies / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1217635684.
Повний текст джерелаYlinen, Tomi. "Search for Gamma-ray Lines from Dark Matter with the Fermi Large Area Telescope." Doctoral thesis, KTH, Partikel- och astropartikelfysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12853.
Повний текст джерелаQC20100525
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