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Dissertations / Theses on the topic 'Unified theories of flavour'

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1

Lindestam, Malte. "Flavour Symmetries in SU(5) Grand Unified Theories." Thesis, KTH, Fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297790.

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The current description of physics on the very smallest scales is given by the standard model (SM) of particle physics. It makes many good predictions and is a highly successful theory. There are however phenomena it cannot explain, and it is therefore not a complete theory of particle physics. Current efforts within theoretical particle physics are focused on theories beyond the SM which may amend its shortcomings. The SM also has aesthetic problems, in that several of its features can be seen as unnatural. There are unexplained patterns in measured masses and mixing parameters, and the fact
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2

Meroni, Aurora. "The Nature of Massive Neutrinos and Unified Theories of Flavour." Doctoral thesis, SISSA, 2013. http://hdl.handle.net/20.500.11767/4812.

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The present Ph.D. thesis is devoted to two fundamental unsolved problems of neutrino physics, which are intimately connected: determining the nature - Dirac or Majorana - of massive neutrinos, which is related with the possibility of existence of New Physics beyond that predicted by the Standard Model (SM) of particle interactions, and, discovering the origin of the patterns of neutrino masses and of leptonic mixing, stemming from new underlying symmetries in the neutrino, charged lepton and quark sectors. The remarkable experimental efforts of the last 15 years or so have delivered an enormo
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3

Lola, Smaragda. "Cosmological aspects of Unified Theories." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333322.

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4

Lee, Chin-Aik. "Selected topics in unified field theories." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 165 p, 2008. http://proquest.umi.com/pqdweb?did=1459917781&sid=10&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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5

McDonald, J. "Aspects of supersymmetric grand unified theories." Thesis, University of Sussex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372726.

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6

Lonsdale, S. R. "Some cosmological aspects of unified theories." Thesis, University of Newcastle Upon Tyne, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378849.

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7

Torrejón, Maguiña Miguel Ángel. "Symmetry breaking in grand unified theories." Master's thesis, Pontificia Universidad Católica del Perú, 2014. http://tesis.pucp.edu.pe/repositorio/handle/123456789/6714.

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In this work we review the symmetry breaking mechanism of gauge theories. On the first chapters of this thesis, we review the concept of symmetry as the action of a group that leaves an object invariant, in particular Lagrangians and actions, and then develop the corresponding globally and gauge symmetric theories and the relationship between them. It also reviewed the concept and general framework of the spontaneous breaking of a symmetry for renormalizable potentials. Correspondingly, two main results for global symmetries, Noether’s theorem and Goldstone’s Theorem, are reviewed in a general
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8

DermÃs̆ek, Radovan. "SO(10) supersymmetric grand unified theories /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486461246816545.

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9

Ziegler, Robert. "Supersymmetry Breaking in Grand Unified Theories." Doctoral thesis, SISSA, 2010. http://hdl.handle.net/20.500.11767/4496.

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Supersymmetric grand unified theories (SUSY GUTs) are very interesting extensions of the minimal supersymmetric standard model (MSSM). They unify strong and electroweak interactions explaining the MSSM quantum numbers, account for presicion gauge coupling unification and stabilize the weak scale. Most importantly, they make remarkable predictions that allow to test them experimentally......
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10

Pernow, Marcus. "Phenomenology of SO(10) Grand Unified Theories." Licentiate thesis, KTH, Partikel- och astropartikelfysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259605.

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Although the Standard Model (SM) of particle physics describes observations well, there are several shortcomings of it. The most crucial of these are that the SM cannot explain the origin of neutrino masses and the existence of dark matter. Furthermore, there are several aspects of it that are seemingly ad hoc, such as the choice of gauge group and the cancellation of gauge anomalies. These shortcomings point to a theory beyond the SM. Although there are many proposed models for physics beyond the SM, in this thesis, we focus on grand unified theories based on the SO(10) gauge group. It predic
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11

Hartmann, Florian [Verfasser]. "Flavour symmetries in Pati-Salam Grand Unifying Theories / Florian Hartmann." Siegen : Universitätsbibliothek der Universität Siegen, 2015. http://d-nb.info/1074758803/34.

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12

Oliveira, Jorge Miguel Da Silva Borges. "Lepton flavour violation, Yukawa unification and neutrino masses in supersymmetric unified models." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340363.

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13

Sönnerlind, Erik. "Threshold Effects in SO(10) Grand Unified Theories." Thesis, KTH, Fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277788.

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14

Di, Luzio Luca. "Aspects of symmetry breaking in grand unified theories." Doctoral thesis, SISSA, 2011. http://hdl.handle.net/20.500.11767/4689.

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15

Ferretti, Luca. "Flavour Models, R-symmetries and non-Abelian Vortices in Supersymmetric Theories." Doctoral thesis, SISSA, 2008. http://hdl.handle.net/20.500.11767/4234.

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16

Bhatti, Abdul Aziz. "Fermion masses and Higgs Physics in Grand Unified Theories." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-114132.

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17

Lanzagorta, Marco. "Infra-red fixed points in supersymmetric Grand Unified theories." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318836.

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18

Holthausen, Martin [Verfasser], and Manfred [Akademischer Betreuer] Lindner. "Towards Testable Theories with Discrete Flavour Symmetries / Martin Holthausen ; Betreuer: Manfred Lindner." Heidelberg : Universitätsbibliothek Heidelberg, 2013. http://d-nb.info/1177148064/34.

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19

Davis, S. C. "Microphysics of cosmic strings in supersymmetric and grand unified theories." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598393.

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In this thesis we investigate the microphysics of cosmic strings in non-minimal quantum field theories. In particular we consider theories in which fermion fields couple to the strings, and those with larger symmetry groups, such as grand unified and supersymmetric theories. By considering these extensions to the minimal model, we obtain a more realistic picture of the properties of cosmic strings. In considering grand unified theories, which have multiple phase transitions, we show that a cosmic string formed at one phase transition can cause the creation of another string-line solution at a
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20

Martens, Waldemar [Verfasser], and M. [Akademischer Betreuer] Steinhauser. "Threshold Corrections in Grand Unified Theories / Waldemar Martens. Betreuer: M. Steinhauser." Karlsruhe : KIT-Bibliothek, 2011. http://d-nb.info/1014279631/34.

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21

Lehmkuhl, Dennis. "Spacetime matters on super-substantivalism, general relativity, and unified field theories." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527350.

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22

Blazek, Tomás. "Supersymmetric grand unified theories and global fits to low energy data /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487940665437557.

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23

Malinsky, Michal. "Quark and Lepton Masses and Mixing in Supersymmetric Grand Unified Theories." Doctoral thesis, SISSA, 2005. http://hdl.handle.net/20.500.11767/4198.

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The material is organized as follows: the first chapter is devoted to several remarks on the two basic supersymmetric GUTs - first the minimal SUSY SU(5) is considered and the main shortcomings are pointed-out in brief, and in the second part these issues are addressed concerning a general class of SO(lO) models. This provides a natural motivation to approach and describe shortly the minimal SUSY SO(lO) scheme in the second chapter. The third chapter is dedicated to a detailed study of the correlations among the quark and lepton masses and mixing within the framework with dominant tripl
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24

Dundee, G. Benjamin (George Benjamin) Cleaver Gerald B. "Grand unified theories in higher dimensions : from the heterotic string to Randall-Sundrum /." Waco, Tex. : Baylor University, 2006. http://hdl.handle.net/2104/4905.

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25

Muntean, Ioan Lucian. "Unification and explanation in early Kaluza-Klein theories." Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3369373.

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Thesis (Ph. D.)--University of California, San Diego, 2009.<br>Title from first page of PDF file (viewed September 17, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 444-468).
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26

Nolland, David John. "Quantum field theories with fermions in the Schrödinger representation." Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4410/.

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This thesis is concerned with the Schrödinger representation of quantum field theory. We describe techniques for solving the Schrödinger equation which supplement the standard techniques of field theory. Our aim is to develop these to the point where they can readily be used to address problems of current interest. To this end, we study realistic models such as gauge theories coupled to dynamical fermions. For maximal generality we consider particles of all physical spins, in various dimensions, and eventually, curved spacetimes. We begin by considering Gaussian fields, and proceed to a detail
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27

Kapner, Daniel J. "A short-range test of Newton's gravitational inverse-square law /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/9694.

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28

Cooney, Paul. "Proton decay matrix elements from lattice QCD." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4042.

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We present results for the matrix elements relevant for proton decay in Grand Unified Theories (GUTs), using two methods. In the indirect method, we rely on an effective field theory description of proton decay, where we need to estimate two low energy constants. We then relate these low energy constants to the proton decay matrix elements using leading order chiral perturbation theory. In the direct method, we calculate the required matrix elements directly; this is computationally more expensive, but the calculation has no systematic error from the use of chiral perturbation theory. The calc
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29

Jansson, Henrik. "Unification in Particle Physics." Thesis, Uppsala universitet, Högenergifysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-295813.

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During the twentieth century, particle physics developed into a cornerstone of modern physics, culminating in the Standard Model. Even though this theory has proved to be of extraordinary power, it is still incomplete in several respects. It is our aim in this bachelor thesis to discuss some possible theories beyond the Standard Model, the main focus being on Grand Unified Theories, while also taking a look at attempts of further unication via discrete family symmetry. At the heart of all these theories lies the concept of local gauge invariance, which is introduced as a fundamental principle,
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30

Riad, Stella. "Studies of effective theories beyond the Standard Model." Licentiate thesis, KTH, Teoretisk partikelfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-154048.

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The vast majority of all experimental results in particle physics can be described by the Standard Model (SM) of particle physics. However, neither the existence of neutrino masses nor the mixing in the leptonic sector, which have been observed, can be described within this model. In fact, the model only describes a fraction of the known energy in the Universe. Thus, we know there must exist a theory beyond the SM. There is a plethora of possible candidates for such a model, such as supersymmetry, extra dimensional theories, and string theory. So far, there are no evidence in favor of these mo
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31

Santapuri, Sushma. "Unified Continuum Modeling of Fully Coupled Thermo-Electro-Magneto-Mechanical Behavior, with Applications to Multifunctional Materials and Structures." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1354726155.

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32

Senoguz, Vedat Nefer. "Aspects of inflationary models and unification." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 114 p, 2007. http://proquest.umi.com/pqdweb?did=1251906411&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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33

Schreiber, Gunhild Ursula. "Introduction to supersymmetry." Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/14358.

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Includes bibliographical references.<br>The tendency in theoretical physics, particularly in the past few decades, has been towards unification: over the years it has emerged that increasingly many physical phenomena can be explained by a common underlying theory. Symmetry principles, both global and local, play an important role in this unification programme. Global symmetries often account for approximate regularities we observe in nature - local or gauge symmetries are understood as basic symmetries which lie at the heart of the interactions of the constituents of matter.
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34

Riad, Stella. "Phenomenology of neutrino properties, unification, and Higgs couplings beyond the Standard Model." Doctoral thesis, KTH, Teoretisk partikelfysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202311.

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The vast majority of experiments in particle physics can be described by the Standard Model of particle physics (SM). However, there are indications for physics beyond it. The only experimentally demonstrated problem of the model is the difficulty to describe neutrino masses and leptonic mixing. There is a plethora of models that try to describe these phenomena and this thesis investigates several possibilities for new models, both full theories and effective frameworks.   The values of the parameters in a model are dependent on the energy scale and we say that the parameters run. The exact be
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35

Laksaniyanon, Benchamat. "Acceptance Theories for Behavior in Conducting Research: Instructors in the Rajabhat University System, Thailand." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc848155/.

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Responding to globalization and its effects on education and research development, the Thai government decided to push all public universities to become autonomous and establish a system of quality assurances. The establishment of quality assurances has had a large impact on many Thai instructors, especially in new public universities. Thai instructors are now forced to more focus on conducting research because the number of research publications is regarded as one of the main criteria for quality universities. The purpose of this study is to investigate the key factors, at the individual and
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36

Crisafulli, Daniela. "Advanced modelling of multilayered composites and functionally graded structures by means of Unified Formulation." Thesis, Paris 10, 2013. http://www.theses.fr/2013PA100055/document.

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La plupart des problèmes d'ingénierie des deux derniers siècles ont été résolus grâce à des modèles structuraux pour poutres, plaques et coques. Les théories classiques, tels que Euler-Bernoulli, Navier et de Saint-Venant pour les poutres, et Kirchhoff-Love et Mindlin-Reissner pour plaques et coques, ont permis de réduire le problème générique 3-D, dans le problème unidimensionnel pour les poutres et deux dimensionnelle pour les coques et les plaques. Théories raffinés d'ordre supérieur ont été proposées au cours du temps, comme les modèles classiques ne consentez pas à d'obtenir une complète
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37

Schradin, Leslie J. "Textures, model building, and orbifold gauge anomalies research in three topics in physics beyond the standard model /." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1166571116.

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38

Elgammal, Sherif. "Detection of high energy electrons in the CMS detector at the LHC." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210208.

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Détection et identification de la réaction quark + anti-quark -> e+ + e- à l'aide du détecteur CMS (Compact Muon Solenoid) auprès du Grand Collisionneur de Hadrons du CERN, le LHC. Cette réaction permet de tester avec précision le Modèle Standard et de rechercher d'éventuelles nouvelles particules (Z') prédites par les théories de grande unification (GUT) et par les modèles à dimensions spatiales supplémentaires.<br>Doctorat en Sciences<br>info:eu-repo/semantics/nonPublished
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39

Coy, Rupert Lawrence. "Two approaches to new physics : effective analyses of lepton observables & composite models of axions." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS052.

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Avec des preuves expérimentales convaincantes que le modèle standard (SM) est incomplet, il est nécessaire d’examiner la manière dont il devrait être étendu.Dans cette thèse, nous étudions des scénarios motivés de physique nouvelle au-dela de l’échelle électrofaible et examinons leurs conséquences aux basses énergies. Deux approches sont retenues, l’une inspirée notamment par le vaste programme expérimental des observables du lepton, l’autre inspirée par les avantages théoriques d’une nouvelle physique fortement couplée proche de l'ordre de l’échelle du TeV.La partie I met l’accent sur les dév
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40

Antão, Laura H. "Effects of ecological scaling on biodiversity patterns." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/13606.

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Biodiversity is determined by a myriad of complex processes acting at different scales. Given the current rates of biodiversity loss and change, it is of paramount importance that we improve our understanding of the underlying structure of ecological communities. In this thesis, I focused on Species Abundance Distributions (SAD), as a synthetic measure of biodiversity and community structure, and on Beta (β) diversity patterns, as a description of the spatial variation of species composition. I systematically assessed the effect of scale on both these patterns, analysing a broad range of commu
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Junior, Mauricio Francisco Caliri. "Contribuição para teoria de placas: análises estruturais de compósitos laminados e estruturas sanduíches via formulações unificadas." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18148/tde-26072016-101122/.

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Em engenharia, a quantidade de problemas geométricos complexos que precisam ser resolvidos empregando teorias de placas ou cascas é notável. Esta é a razão por que há tantas teorias que buscam simplificar os problemas tridimensionais em outros menos custosos computacionalmente. Além disso, o aumento atual do uso de estruturas sanduíche requer que as formulações bidimensionais sejam mais precisas. Esta tese, num primeiro momento, compila a maioria das teorias de placa, comentando as principais diferenças, vantagens e desvantagens de cada uma. As formulações bidimensionais de placas laminadas sã
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42

Charaf, Otman. "Study of Drell-Yan production in the di-electron decay channel and search for new physics at the LHC." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210031.

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Cette these a pour sujet la recherche de nouvelle physique et l'etude de la production Drell-Yan dans le canal di-electron a l'aide du detecteur CMS au LHC. Certaines theories au dela du Modele Standard (extra dimensions, theories de grande unification) predisent l'existence de particules massives pouvant se desintegrer en une paire d'electrons. La selection des evenements recherches est presentee et etudiee. La strategie d'analyse est introduite et testee. Enfin, l'analyse des premieres donnees a 7 TeV est decrite et les resultats sont commentes.<br>Doctorat en Sciences<br>info:eu-repo/semant
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43

Cosme, Nicolas. "Matter asymmetry and gauge unification." Doctoral thesis, Universite Libre de Bruxelles, 2004. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211132.

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Pourquoi reste-t-il de la matière dans l’univers ?Depuis la découverte de l’anti-matière, miroir de la matière dont nous sommes constitués et s’annihilant de prime abord parfaitement avec cette dernière, ce mystère stimule l’étude des propriétés communes et distinctes entre particules et anti-particules.<p><p>Dans ce cadre, il a été établi au vu des interactions dites de jauge (en particulier les interactions électrofaibles) que la symétrie intrinsèque entre particules et anti-particules est la combinaison subtile du conjugué de charge (C) et de la parité d’espace (P) :la symétrie CP. Ainsi, u
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44

Thomas, Laurent. "Search for new heavy narrow resonances decaying into a dielectron pair with the CMS detector." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209221.

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Le sujet de la présente thèse porte sur la recherche de nouvelles particules très massives se désintégrant en une paire électron-positron avec le détecteur CMS.<p>Le démarrage en 2010 du Large Hadron Collider au CERN marque le début d'une nouvelle ère en physique des particules. L'énergie et l'intensité de ses faisceaux de protons, inégalées à ce jour, offre en effet la possibilité d'étudier les lois décrivant les constituants ultimes de la matière et leurs interactions à des énergies jusqu'alors inaccessibles et d'étudier des processus rares. <p>La découverte récente par les expériences ATLAS
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Datta, Alakabha. "Topics in heavy flavor decays and grand unified theories." Thesis, 1995. http://hdl.handle.net/10125/10086.

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46

Iyer, Abhishek Muralidhar. "Randall-Sundrum Model as a Theory of Flavour." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3381.

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The discovery of the Higgs boson by the LHC provided the last piece of the puzzle neces- sary for the Standard Model (SM) to be a successful theory of electroweak scale physics. However there exist various phenomenological reasons which serve as pointer towards the existence of physics beyond the Standard Model. For example the explanation for the smallness of the neutrino mass, baryon asymmetry of the universe, the presence of dark matter and dark energy etc. are not within purview of the Standard Model. Con- ceptual issues like the gauge hierarchy problem, weakness of gravity provide some of
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47

Iyer, Abhishek Muralidhar. "Randall-Sundrum Model as a Theory of Flavour." Thesis, 2013. http://etd.iisc.ernet.in/2005/3381.

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The discovery of the Higgs boson by the LHC provided the last piece of the puzzle neces- sary for the Standard Model (SM) to be a successful theory of electroweak scale physics. However there exist various phenomenological reasons which serve as pointer towards the existence of physics beyond the Standard Model. For example the explanation for the smallness of the neutrino mass, baryon asymmetry of the universe, the presence of dark matter and dark energy etc. are not within purview of the Standard Model. Con- ceptual issues like the gauge hierarchy problem, weakness of gravity provide some of
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48

Thomson, Rowan. "Holographic studies of thermal gauge theories with flavour." Thesis, 2007. http://hdl.handle.net/10012/3229.

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The AdS/CFT correspondence and its extensions to more general gauge/gravity dualities have provided a powerful framework for the study of strongly coupled gauge theories. This thesis explores properties of a large class of thermal strongly coupled gauge theories using the gravity dual. In order to bring the holographic framework closer to Quantum Chromodynamics (QCD), we study theories with matter in the fundamental representation. In particular, we focus on the holographic dual of SU(Nc) supersymmetric Yang-Mills theory coupled to Nf<<Nc flavours of fundamental matter at finite temperature
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49

Ohmann, Paul R. "Phenomenology of supersymmetric grand unified theories." 1994. http://catalog.hathitrust.org/api/volumes/oclc/32026904.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1994.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leave 152-167).
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Summy, Heaya Ann. "SO(10) supersymmetric grand unified theories from cosmology to colliders /." 2008. http://etd.lib.fsu.edu/theses/available/etd-11042008-143042.

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Thesis (Ph. D.)--Florida State University, 2008.<br>Advisor: Howard Baer, Florida State University, College of Arts and Sciences, Dept. of Physics. Title and description from dissertation home page (viewed Feb. 3, 2009). Document formatted into pages; contains xiii, 108 pages. Includes bibliographical references.
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