Дисертації з теми "Astroparticle physics and particle cosmology"
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Scott, Pat. "Searches for Particle Dark Matter Dark stars, dark galaxies, dark halos and global supersymmetric fits /." Doctoral thesis, Stockholm : Department of Physics, Stockholm University, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-38221.
Повний текст джерелаAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 5: Accepted. Paper 6: Submitted. Härtill 6 uppsatser.
Strid, Carl-Fabian. "MAC-E-Filter characterization for PTOLEMY : a relic neutrino direct detection experiment." Thesis, Luleå tekniska universitet, Rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75678.
Повний текст джерелаBirkel, Michael. "Astroparticle physics beyond the standard model." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388826.
Повний текст джерелаNasri, Salah Schechter Joseph. "Neutrinos in particle physics and cosmology." Related Electronic Resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2003. http://wwwlib.umi.com/cr/syr/main.
Повний текст джерелаKaplinghat, Manoj. "Constraints on particle physics from cosmology /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488191667179811.
Повний текст джерелаNunes, Nelson. "Attractor solutions in cosmology and particle physics." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247958.
Повний текст джерелаSalem, Michael Phillip Wise Mark B. "Topics in theoretical particle physics and cosmology /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-05222007-105100.
Повний текст джерелаMartineau, Patrick. "On particle production and brane cosmology." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80328.
Повний текст джерелаDai, De-Chang. "Modified Gravity in Cosmology and Fundamental Particle Physics." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1207065832.
Повний текст джерелаLucente, Michele. "Implication of Sterile Fermions in Particle Physics and Cosmology." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112210/document.
Повний текст джерелаThe neutrino mass generation mechanism, the nature of dark matter and the origin of the baryon asymmetry of the Universe are three compelling questions that cannot be accounted for in the Standard Model of particle physics. In this thesis we focus on all these issues by providing a possible solution in terms of a minimal extension of the Standard Model, consisting in the addition of a set of sterile fermions to the field content of the theory. Sterile fermions are gauge singlet fields, that can interact via mixing with the active neutrinos. We focus on the Inverse Seesaw mechanism, which is characterised by a low (TeV or lower) new physics scale and that can be tested in current and future experimental facilities. We present the model building analysis that points towards the minimal realisations of the mechanism, and the phenomenological study in order to accommodate light neutrino masses and to impose all the relevant experimental constraints in the model, as well as the expected experimental signatures. We show the viability of the sterile neutrino hypothesis as dark matter component, together with the characteristic features of this scenario in the minimal Inverse Seesaw mechanism. The possibility of successfully accounting for the baryon asymmetry in a testable realisation of the leptogenesis mechanism is also addressed.On the other side it is important to look for manifestations of sterile fermions in laboratory experiments. We address this point by making predictions for the expected rates of rare lepton number violating decays of vector bosons, that can be mediated by sterile fermions, as well as by studying the impact of sterile fermions on global fit of electroweak precision data
Lin, Tongyan. "Signals of Particle Dark Matter." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10273.
Повний текст джерелаPhysics
Pongkitivanichkul, Chakrit. "Aspects of particle physics and cosmology from string/M theory." Thesis, King's College London (University of London), 2016. https://kclpure.kcl.ac.uk/portal/en/theses/aspects-of-particle-physics-and-cosmology-from-stringm-theory(c5c9c1b1-8af3-4669-b507-ed3926ef4515).html.
Повний текст джерелаJenkins, Alejandro Wise Mark B. "Topics in particle physics and cosmology beyond the standard model /." Diss., Pasadena, Calif. : Caltech, 2006. http://resolver.caltech.edu/CaltechETD:etd-06022006-145211.
Повний текст джерелаMarsh, David J. E. "The string axiverse and cosmology." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:74063b60-5ede-4205-88d5-b5cbab0b3d1d.
Повний текст джерелаNg, Yifung. "It’s All About Electromagnetism – From Magnetic Monopoles to Cosmological Magnetic Fields." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1291413218.
Повний текст джерелаThompson, Rodger. "The Relation between Fundamental Constants and Particle Physics Parameters." MDPI AG, 2017. http://hdl.handle.net/10150/624359.
Повний текст джерелаWiegand, Alexander [Verfasser]. "The inhomogeneous Universe : its average expansion and cosmic variance / Alexander Wiegand. Fakultät für Physik - Cosmology and Astroparticle Physics." Bielefeld : Universitätsbibliothek Bielefeld, Hochschulschriften, 2012. http://d-nb.info/1026077605/34.
Повний текст джерелаNiblaeus, Carl. "The Sun as a laboratory for particle physics." Licentiate thesis, Stockholms universitet, Fysikum, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-143334.
Повний текст джерелаStrobl, Karl. "Aspects of approximate symmetry in cosmology and nematic liquid crystals." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388483.
Повний текст джерелаEyton-Williams, Oliver John. "Small Yukawa couplings in particle physics and cosmology from Type 1 string theory." Thesis, University of Southampton, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433940.
Повний текст джерелаHeurtier, Lucien. "Particle physics and Cosmology beyond the Standard Model : Inflation, Dark Matter and Flavour." Palaiseau, Ecole polytechnique, 2015. https://theses.hal.science/tel-01176578/document.
Повний текст джерелаThis thesis has been focusing on beyond the Standard Model aspects of particle physics and their implication in cosmology. From the early times of the universe evolution, to current low energy supersymmetry and colliders phenomenology, various works have been achieved using mostly an effective, low energy formulation, at several different periods of the Universe History. Namely, models of Inflation are presented as effective single field theories arising from supergravity, string inspired UV completion models. Furthermore, models of dark matter including a mediator particle are studied with the use of effective higher dimensional operators that are generated explicitly from microscopic underlying theories. Such models were able to produce interesting results for explaining recent measurements on the X-rays spectrum of galaxy clusters. Finally, the study of flavour changing processes in the Dirac gaugino supersymmetric extensions of the Standard Model was explored in details, predicting some challenging signatures that are to be searched for at the next run of the LHC
Gil, Pedro Francisco M. S. V. "On moduli stabilisation and cosmology in type IIB flux compactifications." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:6c3ef85d-df3b-42c6-846d-a4bfdeec85de.
Повний текст джерелаBartrum, Sam John Richard. "Scalar fields : fluctuating and dissipating in the early Universe." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/11760.
Повний текст джерелаAtkins, Michael. "Bounds on the effective theory of gravity in models of particle physics and cosmology." Thesis, University of Sussex, 2013. http://sro.sussex.ac.uk/id/eprint/47195/.
Повний текст джерелаStref, Martin. "Dark Matter on the Galactic Scale : from Particle Physics and Cosmology to Local Properties." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS077/document.
Повний текст джерелаUnderstanding the nature of dark matter is one of the greatest challenges of modern physics. If dark matter is made of particles, we can hope to detect it, directly or indirectly, using Earth-based or spatial experiments. Make predictions for the outcome of these experiments, or interpret the results in case of a detection, requires a deep understanding of the structuring of dark matter in our Galaxy. Starting from particle physics and cosmological considerations, I built a dynamically constrained model of the Galactic dark halo including a detailed description of its inhomogeneities. The impact of these inhomogeneities on searches with cosmic rays is then analysed in details. I also study a method allowing to predict the phase-space distribution of dark matter particles, and discuss its possible application to dark matter searches. This method is then applied to searches with cosmic-ray electrons and positrons, and new very stringent constraints are obtained on microscopic models of dark matter
Kahlhoefer, Felix Karl David. "Complementarity of searches for dark matter." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:ec5b1afe-b75c-44d9-9dad-e0d342e46fa1.
Повний текст джерелаSmirnov, Juri [Verfasser], and Manfred [Akademischer Betreuer] Lindner. "Effects of the Quantum Vacuum in Particle Physics and Cosmology / Juri Smirnov ; Betreuer: Manfred Lindner." Heidelberg : Universitätsbibliothek Heidelberg, 2014. http://d-nb.info/1180300599/34.
Повний текст джерелаCasey, James David. "Search for high energy GRB neutrinos in IceCube." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53839.
Повний текст джерелаAngus, Stephen Andrew. "Phenomenology of dark radiation and string compactifications." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:739ffcb2-bf9d-4fd3-8d6c-911d2d599f5e.
Повний текст джерелаMaia, Jackson Max Furtunato. "Algumas Aplicações de Campos Escalares em Cosmologia." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/43/43132/tde-08112013-150636/.
Повний текст джерелаThree applications of scalar fields to homogeneous and isotropic cosmologies are presented, with distinct motivations and resuIts. In the first case, a Lagrange multiplier technique is used in order to set physical constraints on the curvature invariants possibly present in the low energy effective action of string theory. In a particular case, a nonsingular model is obtained, suggesting a possible correction in the gra- vity action which is compatible to the symmetries of string cosmology. In another approach, a nonsingular model based on the decay of the cosmological term is pro- posed. The model has as a major feature a smooth transition between an inflationary de Sitter phase and a phase with FRW-type dynamics. As a last example, a scalar field thermally coupled to the cosmic fluid is considered. By adop- ting a specific but usual dissipative term, it is defined a parameter space encompassing the most common scalar field cosmologies, as well as the standard model, as limiting cases. Slow roll conditions are obtained and it is presented a simple toy model to illustrate the heuristic potential of the proposed parameters.
Matas, Andrew. "Foundations of Massive Gravity." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1464275510.
Повний текст джерелаAkrami, Yashar. "Supersymmetry vis-à-vis Observation : Dark Matter Constraints, Global Fits and Statistical Issues." Doctoral thesis, Stockholms universitet, Fysikum, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-57194.
Повний текст джерелаAt the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Submitted.
Henz, Tobias [Verfasser], and Jan Martin [Akademischer Betreuer] Pawlowski. "Physics on all Scales : Scalar-Tensor Theories of Quantum Gravity in Particle Physics and Cosmology / Tobias Henz ; Betreuer: Jan Martin Pawlowski." Heidelberg : Universitätsbibliothek Heidelberg, 2016. http://d-nb.info/1180614623/34.
Повний текст джерелаMütter, Andreas [Verfasser], Andreas [Akademischer Betreuer] Weiler, Andreas [Gutachter] Weiler, and Alejandro [Gutachter] Ibarra. "Cosmology and Particle Physics in Heterotic Orbifolds / Andreas Mütter ; Gutachter: Andreas Weiler, Alejandro Ibarra ; Betreuer: Andreas Weiler." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1220321265/34.
Повний текст джерелаKronberg, Nico. "Exploring the parameter space of warm inflation." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/22841.
Повний текст джерелаKulkarni, Suchita C. [Verfasser]. "Combining theory and observations : a sample study of the interplay between cosmology and particle physics / Suchita C. Kulkarni." Bonn : Universitäts- und Landesbibliothek Bonn, 2011. http://d-nb.info/1016181124/34.
Повний текст джерелаLundström, Erik. "Phenomenology of Inert Scalar and Supersymmetric Dark Matter." Doctoral thesis, Stockholms universitet, Fysikum, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-39278.
Повний текст джерелаNadathur, Seshadri. "Inflation, large-scale structure and inhomogeneous cosmologies." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:b8c5c6ff-53be-4c1e-97bc-4442c5bfba30.
Повний текст джерелаJendrysik, Christian [Verfasser], Siegfried [Akademischer Betreuer] Bethke, and Jonathan J. [Akademischer Betreuer] Finley. "Development and characterisation of silicon photomultipliers with bulk-integrated quench resistors for future applications in particle and astroparticle physics / Christian Jendrysik. Gutachter: Jonathan J. Finley ; Siegfried Bethke. Betreuer: Siegfried Bethke." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1054419868/34.
Повний текст джерелаObranovich, Michael A. "The effects of non-zero neutrino masses on the CMB determination of the cosmological parameters." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1337799009.
Повний текст джерелаVertongen, Gilles. "The fall and rise of antimatter: probing leptogenesis and dark matter models." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210200.
Повний текст джерелаAmong the possible mechanism which could be responsible for the creation of such a matter asymmetry, leptogenesis is particularly attractive because it only relies on the same ingredients previously introduced to generate neutrino masses. Unfortunatelly, this elegant proposal suffers from a major difficulty :it resists to any tentative of being probed by our low energy observables. In this thesis, we tackle the problem the other way around and propose a way to falsify this mechanism. Considering the type-I leptogenesis mechanism, i.e. a mechanism based on the asymmetric decay of right-handed neutrinos, in a left-right symmetric framework, we show that the observation of a right-handed gauge boson W_R at future colliders would rule out any possibility for such mechanism to be responsible of the matter asymmetry present in our Universe.
Another intriguing question that analyses of the anisotropies of the CMB confirmed is the presence of a non-baryonic component of matter in our Universe, i.e. the dark matter. As hinted by observations of galactic rotation curves, it should copiously be present in our galactic halo, but is notoriously difficult to detect directly. We can take advantage on the fact that antimatter almost disappeared from our surroundings to detect the contamination of cosmic rays from standard sources the annihilation products of dark matter would produce.
The second subject tackled in this work is the study of the imprints the Inert Doublet Modem (IDM) could leave in (charged) cosmic rays, namely positrons, antprotons and antideuterons. This model, first proposed to allow the Bout-Englert-Higgs particle to evade the Electroweak Precision Test (EWPT) measurements, introduces an additional scalar doublet which is inert in the sense that it does not couple directly to fermions. This latter property brings an additional virtue to this additional doublet :since it interacts weakly with particles, it can play the role of dark matter. This study will be done in the light of the data recently released by the PAMELA, ATIC and Fermi-GLAST collaborations, which reported e^± excesses in two different energy ranges.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Carvalho, Fabio Cabral. "Teorias escalares-tensoriais e o regime superacelerado do universo: aspectos dinâmicos." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-14112013-141225/.
Повний текст джерелаWe analyzes, in particular, the stability of tracker solutions. Our analyzes is global, based in the existence of Lyapunov functions for fixed points previously identified in the literature and studied in the local linear regime. The methodology developed in the cosmological context is applied to find superaccelerated solutions, defined when the equation of state is very negative ( = p/ < -1), and to obtain the attraction basin around the stable fixed point. Based in these results, we propose a model free of classical and/or quantum instabilities, capable of describing the recently discovered fase of accelerated expantion of the Universe, including the possible superaccelerated regime slightly favored by the available observational data.
Wallisch, Benjamin. "Cosmological probes of light relics." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/283003.
Повний текст джерелаElmer, Martin. "Nouvelle physique entre cosmologie et le LHC : axions, neutrinos et Z'." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10178/document.
Повний текст джерелаDuring the three years as a PhD student I had the pleasure to work on three major projects which are united in the goal to better constrain new physics models between cosmology and the LHC. The similar values of dark matter and baryon relic abundances raise the question whether there is a link between them. We attempt to explain the observed values by relating leptogenesis to the WIMP miracle which gives naturally the right relic abundance. If the baryon asymmetry is produced in electroweak-scale-out-of-equilibrium decays and dark matter is made of WIMPs, both relic densities are controlled by electroweak scale interactions going out of equilibrium. We construct a TeV-scale leptogenesis model using an inverse-seesaw extension of the SM with additional singlets. To produce a large enough asymmetry we require CP violation ∼ O(1) which is difficult to achieve in our set-up. Axions as well as WIMPs are well motivated dark matter candidates. It would be very useful to be able to tell them apart. Sikivie argues that if axions are in a Bose-Einstein condensate they could form a different galactic dark matter halo than WIMPs and that gravitational interactions drive axions into a Bose-Einstein condensate. However for the formation of such a condensate entropy generation is needed which leading order gravitational interactions do not provide. We explore the entropy generation of gravitational interactions by estimating a dissipation scale in the axion fluid due to the presence of a anisotropic stress. We cannot confirm a fast gravitational thermalisation rate. New neutral gauge bosons like the Z' are generic extensions of the standard model which appear in many different models. Traditionally these particles are searched for in resonant searches at colliders, i.e. by producing the particles on-shell and looking for a resonance in the invariant mass spectrum of their decay products. However the presence of a Z' can also affect other kinematic observables without being actually produced on-shell, i.e. non-resonant searches. We compare compare resonant and non-resonant searches at the LHC and find that while for small couplings resonant searches are more sensitive, for larger couplings non-resonant searches are more efficient
Fradette, Anthony. "Particle physics probes from cosmology." Thesis, 2017. https://dspace.library.uvic.ca//handle/1828/8918.
Повний текст джерелаGraduate
Guo, Huicheng. "Topics in particle physics and cosmology." 2009. http://wwwlib.umi.com/dissertations/fullcit/3362828.
Повний текст джерелаSalem, Michael Phillip. "Topics in theoretical particle physics and cosmology." Thesis, 2007. https://thesis.library.caltech.edu/1953/1/thesis.pdf.
Повний текст джерелаUnderwood, Bret James. "Warped string phenomenology : topics in cosmology and particle Physics /." 2008. http://www.library.wisc.edu/databases/connect/dissertations.html.
Повний текст джерелаKrislock, Abram Michael. "Making the Dark Matter Connection Between Particle Physics and Cosmology." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9998.
Повний текст джерелаJenkins, Alejandro. "Topics in particle physics and cosmology beyond the standard model." Thesis, 2006. https://thesis.library.caltech.edu/2403/1/thesis.pdf.
Повний текст джерела