Relevant bibliographies by topics / Standard Electroweak Model / Dissertations / Theses
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Dissertations / Theses on the topic 'Standard Electroweak Model'

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Published: 7 September 2023

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1

Fromme, Lars. "Electroweak baryogenesis in extensions of the standard model." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980804515.

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2

Díaz, Méndez Enrique. "Electroweak scale neutrinos." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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3

Yamashita, Hiroki 1981. "Electroweak phase transition and singlet Majoron model." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101691.

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First, we review the basics of baryogenesis and models for baryogenesis in the early literature. Then, we discuss the main theme in this thesis, electroweak baryogenesis, which utilizes the electroweak phase transition. We present how the phase transition can be used to achieve baryogenesis. Next, we develop our model, which is the Standard Model with a singlet field coupled to the Higgs doublet negatively and to the right-handed neutrinos. It is a simple extension of the singlet Majoron model. We focus on numerical analysis of the model. Parameter space satisfying all the conditions are found
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4

Athron, Peter. "Aspects of electroweak symmetry breaking in physics beyond the standard model." Thesis, University of Glasgow, 2008. http://theses.gla.ac.uk/513/.

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Fine tuning in the Standard Model (SM) is the basis for a widespread expectation that the minimal model for electroweak symmetry breaking, with a single Higgs boson, is not realised in nature and that new physics, in addition to (or instead of) the Higgs, will be discovered at the Large Hadron Collider (LHC). However constraints on new physics indicate that many models which go beyond the SM (BSM) may also be fine tuned (although to a much lesser extent). To test this a reliable, quantitative measure of tuning is required. We review the measures of tuning used in the literature and propose an
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5

Marx, Marilyn. "Standard model and exotic diboson production with the ATLAS detector." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/standard-model-and-exotic-diboson-production-with-the-atlas-detector(7a674cb6-dd88-46d3-9506-6b9f1074eac7).html.

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6

Fok, Ricky. "Scenarios of Physics Beyond the Standard Model." Thesis, University of Oregon, 2011. http://hdl.handle.net/1794/11940.

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xviii, 124 p. : ill. (some col.)<br>This dissertation discusses three topics on scenarios beyond the Standard Model. Topic one is the effects from a fourth generation of quarks and leptons on electroweak baryogenesis in the early universe. The Standard Model is incapable of electroweak baryogenesis due to an insufficiently strong enough electroweak phase transition (EWPT) as well as insufficient CP violation. We show that the presence of heavy fourth generation fermions solves the first problem but requires additional bosons to be included to stabilize the electroweak vacuum. Introducing su
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7

Del, Donno Antonio. "Testing electroweak baryogenesis at LHC in a minimal extension of the Standard Model." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/17052/.

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Il modello standard è la teoria che descrive con spettacolare accuratezza le interazioni fra i costituenti fondamentali della materia come oggi ci sono noti. Nonostante il successo nel confronto fra teoria ed esperimenti, diverse questioni rimangono insolute. Indicazioni esistono riguardo l'esistenza di fisica oltre il modello standard, anche se ancora ignoriamo la sua natura. L'obiettivo principale di questo lavoro è di caratterizzare una delle più semplici estensioni del modello standard che prevede un singoletto scalare interagente con il solo bosone di Higgs. Questo nuovo stato potrebbe
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8

Tayduganov, Andrey. "Electroweak radiative B-decays as a test of the Standard Model and beyond." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00648217.

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Recently the radiative B-decay to strange axial-vector mesons, B--> K1(1270) gamma, was observed with a rather large branching ratio. This process is particularly interesting as the subsequent K1-decay into its three-body final state allows us to determine the polarization of the photon, which is mostly left(right)-handed for Bbar(B) in the Standard Model while various new physics models predict additional right(left)-handed components. In this thesis, a new method is proposed to determine the polarization, exploiting the full Dalitz plot distribution, which seems to reduce significantly the s
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9

Lyonnet, Florian. "New heavy resonances : from the electroweak to the planck scale." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENY035/document.

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Le principe d'invariance de jauge local est au centre de la physique des particules moderne. Dans le modèle standard (MS), il repose sur le groupe de jauge ad hoc SU(3)_c x SU(2)_L x U(1)_Y. L'idée d'étendre ce groupe de jauge est particulièrement attrayante dans une perspective de ``Grand Unified Theory'' (GUT) où le MS est la limite basse énergie d'une théorie plus fondamentale basée sur un groupe de jauge beaucoup plus large tel que SO(10) ou E(6). En effet, lors de la brisure de symétrie du groupe de GUT au MS, des facteurs de groupe non-brisés supplémentaires, tels que U(1) ou SU(2), peuv
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10

Xue, Ying. "Quantum field-theoretical investigations in nonperturbative QCD and beyond-the-standard-model electroweak physics." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0012/NQ31168.pdf.

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11

Rank, Jörn [Verfasser]. "Thermal Screening Masses in the Standard Model of Strong and Electroweak Interactions / Jörn Rank." Bielefeld : Universitätsbibliothek Bielefeld, 1998. http://d-nb.info/1034401319/34.

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12

Konstandin, Thomas. "CP-violation and baryogenesis on electroweak scales cosmological predictions for the standard model and beyond /." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975800280.

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13

Carrington, James Michael. "Vacuum stability of the standard model and BSM extensions." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8851.

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The Standard Model scalar potential contains a minimum at the Electroweak scale, responsible for the masses of the weak gauge bosons through the Higgs mechanism. However, if the Electroweak minimum is only a local minimum, and there exists a global minimum at a higher energy in the Higgs potential, then in a su ciently old universe we would expect the vacuum expectation value to be at the global minimum. The absence of a global minimum at higher energy is related to the condition that the Higgs self coupling is greater than or equal to zero for all energies. For any model that fails this, we e
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14

Papucci, Michele. "Electroweak Symmetry Breaking with a compact extra dimension." Doctoral thesis, Scuola Normale Superiore, 2009. http://hdl.handle.net/11384/85837.

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[Excerpt from the preface]: During my Ph.D. course, under the supervision of Riccardo Barbieri, I started working on Theoretical High Energy Physics. In particular I focused on the problem of Electroweak Symmetry Breaking and in this context I investigated the bene ts of introducing a compact extra dimension. In a series of papers, together with Riccardo Barbieri, Guido Marandella, Lawrence Hall, Yasunori Nomura, Takemichi Okui and Steven Oliver I built supersymmetric models in 5D and studied their phenomenology in detail [1, 2, 3, 4]. In this models Supersymmetry is broken by boundary
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15

Dartsi, Olympia. "Recherche de la production électrofaible de paires Zγ et mesure de la section efficace différentielle de production de Zγ en association avec deux jets dans l'ATLAS expérience du LHC". Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAY085.

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Le sujet physique de ma thèse est la mesure de la section efficace de di-boson Zgamma; production en association avec une paire de dijet à haute masse.Les données de collision protons-protons de l’expérience ATLAS au Grand collisionneur de hadrons du CERN à une énergie dans le centre de masse de13 TeV, recueillies en 2015 et 2016 et correspondant à une luminosité intégrée de 36.1 fb^{-1} sont analysées. La production électrofaible d’événements Zgammajj donne un accès direct à la nature du mécanisme de brisure spontanée de symétrie électrofaible, en sondant les couplages quantiques de boson WWZ
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16

Gadfort, Thomas. "Evidence for electroweak top quark production in proton-antiproton collisions at sqrt(s) = 1.96 TeV /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/9684.

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17

Humbert, Pascal [Verfasser], and Manfred [Akademischer Betreuer] Lindner. "Alternative Electroweak Symmetry Breaking based on Conformal Extensions of the Standard Model / Pascal Humbert ; Betreuer: Manfred Lindner." Heidelberg : Universitätsbibliothek Heidelberg, 2016. http://d-nb.info/1180616472/34.

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18

Lee, Christopher Wise Mark B. "Probing physics in the standard model and beyond with electroweak baryogenesis and effective theories of the strong interactions /." Diss., Pasadena, Calif. : California Institute of Technology, 2005. http://resolver.caltech.edu/CaltechETD:etd-05272005-162229.

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19

Feigl, Bastian [Verfasser], and D. [Akademischer Betreuer] Zeppenfeld. "Electroweak Processes in the Standard Model and Beyond: Backgrounds to Higgs Physics and Semileptonic Decay Modes / Bastian Feigl. Betreuer: D. Zeppenfeld." Karlsruhe : KIT-Bibliothek, 2013. http://d-nb.info/1044956194/34.

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20

CETORELLI, FLAVIA. "First observation of the electroweak production of a W+W- pair in association with two jets in the fully leptonic channel with the CMS detector at the LHC." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2022. http://hdl.handle.net/10281/369032.

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Questa tesi riporta la prima osservazione della produzione elettrodebole di una coppia di bosoni W+W- in associazione con due jet nello stato finale leptonico. L’analisi è stata svolta sui dati raccolti dal rivelatore CMS durante le collisioni p-p ad un’energia del centro di massa di 13 TeV, che si sono svolte al Large Hadron Collider (LHC) nel periodo 2016-2018. La produzione elettrodebole di due bosoni W+W- appartiene alla classe dei processi rari di vector boson scattering (VBS). Lo studio di processi VBS è uno degli obiettivi centrali di LHC, poiché sono direttamente connessi al bosone di
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21

Lee, Jae Yong. "The little Higgs and some phenomenology /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/9645.

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22

Suster, Carl Joseph Edmund. "Cross-section measurements of the electroweak production of a single top quark in association with a W boson at √s = 13 TeV with the ATLAS detector." Thesis, The University of Sydney, 2019. https://hdl.handle.net/2123/21615.

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The top quark is the most massive fundamental particle within the Standard Model of particle physics, discovered at Fermilab in 1995. In pp collisions at the Large Hadron Collider at CERN, large quantities of top quarks are produced, offering the first opportunity to explore its properties in rarer production modes in detail. This thesis presents measurements of the cross-section of the electroweak production of a single top quark in association with a W boson, using data collected at 13 TeV centre-of-mass energy with the ATLAS detector. The total tW production cross-section is measured in eve
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23

Becker, Sebastian. "Estimation of standard model backgrounds to the search for electroweak production of supersymmetry in events with at least two tau leptons in the final state." Diss., Ludwig-Maximilians-Universität München, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-162539.

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This thesis presents a search for Supersymmetry in events with at least two hadronically decaying tau leptons and missing transverse energy. The ana\-lysis is focused on the electro-weak production of gaugino pairs. Electroweak production processes for SUSY particles are promising candidates for the discovery of Supersymmetry with $R$-parity conservation at hadron-hadron colliders. For the analysis a sample of proton-proton collisions at a center of mass energy of $\sqrt{s}=\unit[8]{TeV}$ with an integrated luminosity of $\int {\cal L}~\mathrm{dt}= \unit[20.3]{fb^{-1}}$ is used. The collisio
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24

Becker, Sebastian [Verfasser], and Dorothee [Akademischer Betreuer] Schaile. "Estimation of standard model backgrounds to the search for electroweak production of supersymmetry in events with at least two tau leptons in the final state / Sebastian Becker. Betreuer: Dorothee Schaile." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://d-nb.info/1044532319/34.

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25

Zeman, Martin. "Measurement of the Standard Model W⁺W⁻ production cross-section using the ATLAS experiment on the LHC." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112263/document.

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Les mesures de sections efficaces de production di-bosons constituent une partie importante du programme de physique au Large Hadron Collider (Grand collisionneur de hadrons) au CERN. Ces analyses de physique offrent la possibilité d'explorer le secteur électrofaible du modèle standard à l'échelle du TeV et peuvent être une indication de l'existence de nouvelles particules au-delà du modèle standard. L'excellente performance du LHC dans les années 2011 et 2012 a permis de faire les mesures très compétitives. La thèse donne un aperçu complet des méthodes expérimentales utilisées dans la mesure
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26

Buttazzo, Dario. "Implications of the discovery of a Higgs boson with a mass of 125 GeV." Doctoral thesis, Scuola Normale Superiore, 2013. http://hdl.handle.net/11384/85868.

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The discovery of a Higgs-like particle by the ATLAS and CMS experiments at the LHC has been a major event for particle physics. The rather precise knowledge of the mass of the Higgs boson and of its couplings to the other Standard Model elds has important consequences for the physical phenomena taking place at the Fermi scale of electroweak symmetry breaking. We will analyze some of these implications in the most motivated frameworks for physics at that scale { supersymmetry, models of a composite Higgs boson, and the Standard Model itself. At the same time, precision experiments in
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27

Gumpert, Christian. "Measurement of Electroweak Gauge Boson Scattering in the Channel pp → W ± W ± jj with the ATLAS Detector at the Large Hadron Collider." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-162847.

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Particle physics deals with the elementary constituents of our universe and their interactions. The electroweak symmetry breaking mechanism in the Standard Model of Particle Physics is of paramount importance and it plays a central role in the physics programmes of current high-energy physics experiments at the Large Hadron Collider. The study of scattering processes of massive electroweak gauge bosons provides an approach complementary to the precise measurement of the properties of the recently discovered Higgs boson. Owing to the unprecedented energies achieved in proton-proton collisions a
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28

Khandoga, Mykola. "Calibration of electron shower shapes, hadronic recoil reconstruction using deep learning algorithms and the measurement of W boson transverse momentum distribution with the ATLAS detector." Thesis, université Paris-Saclay, 2020. https://tel.archives-ouvertes.fr/tel-03143181.

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La première partie de la thèse contient une description de la méthode d'étalonnage du calorimètre électromagnétique, corrigeant les différences entre les données et la simulation pour ce qui concerne le développement des cascades électromagnétiques dans le calorimètre. La méthode améliore l'identification des électrons et réduit l'incertitude systématique associée. La majeure partie de la thèse est consacrée à la mesure précise du spectre en impulsion transverse (pT) du boson W à l'aide des données collectées par l'expérience ATLAS à des énergies dans le centre de masse de 5 et 13 TeV lors de
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29

Anger, Philipp. "Probing Electroweak Gauge Boson Scattering with the ATLAS Detector at the Large Hadron Collider." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-151612.

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Electroweak gauge bosons as central components of the Standard Model of particle physics are well understood theoretically and have been studied with high precision at past and present collider experiments. The electroweak theory predicts the existence of a scattering process of these particles consisting of contributions from triple and quartic bosonic couplings as well as Higgs boson mediated interactions. These contributions are not separable in a gauge invariant way and are only unitarized in the case of a Higgs boson as it is described by the Standard Model. The process is tied to the ele
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30

Bey, Anissa. "Test du Modèle Standard à basse énergie : mesure précise des rapports d’embranchement de 62 Ga : mesure précise de la durée de vie de 38 Ca." Thesis, Bordeaux 1, 2008. http://www.theses.fr/2008BOR13667/document.

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L’étude précise des transitions ß de Fermi super-permises 0+ ? 0+ offre un outil précieux pour explorer les propriétés de l’interaction faible dans le cadre du Modèle Standard (SM). Collectivement, les forces (ft) mesurées pour ces transitions permettent de vérifier l’hypothèse CVC et contribuent au test le plus rigoureux de l’unitarité de la première ligne de la matrice de mélange des quarks CKM en fournissant l’évaluation la plus précise de l’élément dominant (Vud). Jusqu’à récemment, un apparent défaut d’unitarité a semé le doute sur la validité du SM minimal et a mobilisé un effort considé
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31

Bey, Anissa. "Test du Modèle Standard à basse énergie :- Mesure précise des rapports d'embranchement de 62Ga- Mesure précise de la durée de vie de 38Ca." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2008. http://tel.archives-ouvertes.fr/tel-00404413.

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L'étude précise des transitions β de Fermi super-permises 0+ → 0+ offre un outil précieux pour explorer les propriétés de l'interaction faible dans le cadre du Modèle Standard (SM). Collectivement, les forces (ft) mesurées pour ces transitions permettent de vérifier l'hypothèse CVC et contribuent au test le plus rigoureux de l'unitarité de la première ligne de la matrice de mélange des quarks CKM en fournissant l'évaluation la plus précise de l'élément dominant (Vud). Jusqu'à récemment, un apparent défaut d'unitarité a semé le doute sur la validité du SM minimal et a mobilisé un effort considé
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32

Madar, Romain. "Identification des leptons tau et recherche du boson de Higgs dans l'état final mu+tau dans l'expérience D0 auprès du Tevatron." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00620824.

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La notion de symétrie de jauge est au coeur de notre compréhension de l'interaction électrofaible et permet d'expliquer l'ensemble des observations expérimentales actuelles. Pourtant, l'incompatibilité intrinsèque entre l'invariance de jauge et la masse des particules nécessite d'introduire une nouvelle particule, le boson de Higgs, toujours non observée à ce jour. Cette thèse présente l'analyse de 7.3/fb de collisions protons-antiprotons à sqrt{s} = 1.96 TeV enregistrées par le détecteur D0 au Tevatron en vue de la recherche du boson de Higgs dans l'état final mu+tau. Cette analyse vient comp
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33

Nicol, Michelle. "Analysis of the rare decay B->K*ee at LHCb." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112354/document.

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Grâce à la grande section efficace de production de paires bb, LHC offre une excellente occasion de faire des études de courants neutres changeant la saveur. Ces transitions sont sensibles aux effets de nouvelle physique. Cette thèse porte sur l'analyse des événements B-&gt;K*ee qui permettent de mesurer la fraction de photon avec une polarisation droite et donc de rechercher des signaux de nouvelle physique émis dans la transition b -&gt;s. En effet, dans le Modèle Standard, la polarisation des photons est gauche. La paire e+e, lors que la masse invariante de la paire de leptons est basse, pr
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34

Bouchart, Charles. "Phenomenology of the electroweak sector in warped (supersymmetric) extra-dimensional models." Paris 11, 2010. http://www.theses.fr/2010PA112331.

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On se place dans le cadre des modèles à dimension supplémentaire courbe adressant le problème de hiérachie de jauge. On considère ainsi le scenario suggéré par Randall et Sundrum sous l'hypothèse habituelle d'une symétrie de jauge custodiale étendue à l'espace total à 5 dimensions, permettant de protéger le modèle de trop larges corrections dans le secteur électrofaible, où le champ de Higgs est indépendament localisé sur ce qui est appelée la TeV-brane. Après avoir revu les bases de théorie des champs en dimensions supplémentaires, on introduit le cadre théorique des modèles RS, nous exposons
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35

Li, Shu. "Mesure de la production W+W− dans les collisions proton-proton à $\sqrt{s} = 7 TeV avec le détecteur ATLAS au LHC." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4107.

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Cette thèse présente le mesure des sections efficaces de production WW MS et la détermination des couplages triples (TGCs) correspondants en utilisant ces 4.7 fb⁻¹ de donnes 2011 de collision pp. Ces mesures permettent un test contraignant du secteur 'électrofaible non abélien SU(2) X U(1) du Modèle Standard; donnent l'opportunité de sonder la nouvelle physique `a travers les couplages triples anormaux de bosons de jauge (aTGCs) qui seront observés dans la distribution des variables cinématiques des WW produits ou de leurs produits de désintégration finaux dans le secteur de haute 'énergie; et
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36

Faïf, Anne-Marie Garance. "Mesure de la section efficace totalement leptonique et des rapports d'embranchement des bosons W+- dans le cadre de l'expérience ALEPH à LEP2." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10248.

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Ce travail de these s'inscrit dans le cadre des mesures de precision effectuees a lep2. Les bosons w# y sont produits par paires dans les collisions e#+e#. Les etats finals totalement leptoniques (l$$$$l) representent 10. 5% de ces desintegrations. Ce canal s'ajoute aux canaux hadroniques et semi-leptoniques pour contraindre le modele standard. Les etats finals l$$$$l, caracterises par deux leptons charges energiques et acolineaires ainsi qu'une importante impulsion transverse manquante, ont ete selectionnes parmi les donnees enregistrees par l'experience aleph entre 1996 et 1998. Les sections
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37

Fromme, Lars [Verfasser]. "Electroweak baryogenesis in extensions of the standard model / presented by Lars Fromme." 2006. http://d-nb.info/980804515/34.

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38

Olszewski, Paweł. "Electroweak Vacuum in Standard Model and in its Extension Motivated by Scale Symmetry." Doctoral thesis, 2019. https://depotuw.ceon.pl/handle/item/3506.

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At the beginning of the thesis the following aspects of quantum field theory are presented: momentum and loop expansion of scalar effective action, spontaneous breaking of a symmetry and vacuum instability. They are discussed in detail both in general and in the context of particular gauge-symmetric models including the Stan- dard Model. Then scale symmetry is introduced with emphasis on its interplay with renormalization of the model. The notion of quantum scale symmetry is defined and used to propose a novel extension of the Standard Model. Stability of the electroweak vacuum is compared bet
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39

Long, Brian Alexander. "WWW production at the LHC." Thesis, 2016. https://hdl.handle.net/2144/17737.

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In 2012 a resonance with a mass of 125 GeV resembling the elusive Higgs boson was discovered simultaneously by the ATLAS and CMS experiments using data collected from the Large Hadron Collider (LHC) at CERN. Its observation finally confirms the mechanism for Spontaneous Electroweak Symmetry Breaking (EWSB) necessary for describing the mass structure of the electroweak (EW) gauge bosons. In 2013, Peter Higgs and Francois Englert were awarded the Nobel Prize in physics for their work in developing this theory of EWSB now referred to as the Higgs mechanism. The explanation for EWSB is often r
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40

Lee, Christopher. "Probing Physics and the Standard Model and Beyond with Electroweak Baryogenesis and Effective Theories of the Strong Interactions." Thesis, 2005. https://thesis.library.caltech.edu/2160/1/thesis.pdf.

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<p>We address in this thesis two primary questions aimed at improving our ability to calculate reliably in the Standard Model of particle physics and probing possible new particles which may exist beyond it.</p> <p>First, we embark on an attempt to account for the abundance of matter in the present Universe if earlier in its history matter and antimatter were equally abundant. We explore whether baryogenesis at the electroweak phase transition could successfully account for the observed density of baryons in the Universe, using the closed-time-path (CTP) formalism of quantum field theory to
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41

Konstandin, Thomas [Verfasser]. "CP-violation and baryogenesis on electroweak scales : cosmological predictions for the standard model and beyond / presented by Thomas Konstandin." 2005. http://d-nb.info/975800280/34.

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42

Li, Yen-Ting, and 李彥頲. "Standard Model with a Real Singlet Scalar: An Investigation of Scheme Dependence and Gauge Dependence in Electroweak Phase Transition." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/bb7e33.

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碩士<br>國立臺灣大學<br>物理學研究所<br>107<br>In this thesis, the standard model is extended with a real singlet scalar $S$ to achieve a two-step electroweak phase transition (EWPT). The model is investigated with several schemes to quantify the scheme dependence and the gauge dependence issue. In on-shell(OS)-like scheme, at the one-loop order, Nambu-Goldstone boson contributions are needed to be resummed to circumvent the IR divergence; their effects in the EWPT are studied and quantified. The critical temperatures and critical vacuum expectation values of the EWPT in the OS-like and the MS-bar schemes a
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GORI, VALENTINA. "Search for a high mass Higgs-like boson produced via Vector Boson Fusion, in the decay channel H -> ZZ -> llqq (l=e, mu) with the CMS detector." Doctoral thesis, 2015. http://hdl.handle.net/2158/1020428.

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Nella tesi si presenta il lavoro di analisi condotto nell'ambito dell'esperimento CMS ad LHC per la ricerca di un bosone di Higgs ad alta massa, prodotto con il meccanismo della Vector Boson Fusion e con decadimento in due bosoni Z, che a loro volta decadono in una coppia di leptoni e una coppia di quark. I risultati sono interpretati sia nell'ambito del Modello Standard che nello scenario di Electroweak singlet. Si sono usate tecniche multivariate (machine learning).
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Gumpert, Christian. "Measurement of Electroweak Gauge Boson Scattering in the Channel pp → W ± W ± jj with the ATLAS Detector at the Large Hadron Collider." Doctoral thesis, 2014. https://tud.qucosa.de/id/qucosa%3A28577.

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Particle physics deals with the elementary constituents of our universe and their interactions. The electroweak symmetry breaking mechanism in the Standard Model of Particle Physics is of paramount importance and it plays a central role in the physics programmes of current high-energy physics experiments at the Large Hadron Collider. The study of scattering processes of massive electroweak gauge bosons provides an approach complementary to the precise measurement of the properties of the recently discovered Higgs boson. Owing to the unprecedented energies achieved in proton-proton collisions a
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GONZI, SANDRO. "Study of gamma + jets data with the CMS detector in pp collisions at sqrt(s) = 8 TeV." Doctoral thesis, 2014. http://hdl.handle.net/2158/839694.

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The characterization of the production process of prompt photons γ in association with hadronic jets (γ + jets process) at the Large Hadron Collider (LHC), is one of the goals in physics analyses at the Compact Muon Solenoid (CMS) experiment. This channel provides a way of directly probing the hard scattering process and it is directly sensitive to the gluonic content of the proton. This process is also the starting point for the study of many Standard Model signatures, and constitutes a background for important searches, such as H->γγ, or SUSY and extra-dimensions with energetic photons in th
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Pan, Jie. "Towards a Precision Measurement of Parity-Violating e-p Elastic Scattering at Low Momentum Transfer." 2012. http://hdl.handle.net/1993/8124.

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The goal of the Q-weak experiment is to make a measurement of the proton's weak charge ($Q^p_W = 1-4\sin^2\theta_W$) to an accuracy of ~4%. This would represent a ~0.3% determination of the weak mixing angle ($\sin^2\theta_W$) at low energy. The measurement may be used for a precision test of the Standard Model (SM) prediction on the running of $\sin^2\theta_W$ with energy scale. The Q-weak experiment operates at Thomas Jefferson National Accelerator Facility (Jefferson Lab). The experiment determines the proton's weak charge by measuring the parity violating asymmetry in elastic electron-prot
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Soukup, Petr. "Elektroslabé procesy v rámci efektivní polní teorie." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-275933.

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Title: Electroweak processes in the framework of effective field theory Author: Petr Soukup Department: Institute of Particle and Nuclear Physics Supervisor: RNDr. Karol Kampf, Ph.D. Supervisor's e-mail address: kampf@troja.mff.cuni.cz Abstract: In this thesis, we study electroweak processes within the framework of ef- fective field theory employing the approach of effective Lagrangians. We mainly focus on the decay process H → γγ. A complete set of SU(2) × U(1) invariant dimension- six operators is utilized. We present a brief introduction to GWS Standard model and dimension-six effective ope
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