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Dissertations / Theses on the topic 'Spontaneous chiral symmetry breaking'

Author: Grafiati

Published: 4 May 2024

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1

De, Asitkumar. "Spontaneous chiral symmetry breaking and fermion mass generation in Lattice field theories /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487591658176323.

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2

Speer, David [Verfasser]. "Spontaneous symmetry breaking transport : from anomalous response to chiral separation / David Speer. Fakultät für Physik. Abt. Theoretische Physik : Theorie der Kondensierten Materie." Bielefeld : Universitätsbibliothek Bielefeld, Hochschulschriften, 2011. http://d-nb.info/1011897105/34.

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3

Matheson, A. "Chiral symmetry breaking." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234997.

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4

Gautam, Bhavesh. "Effets collectifs des micronageurs dans les cristaux liquides nématiques." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0062.

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La thèse se concentre sur les effets collectifs des micro-nageurs dans les cristaux liquides nématiques. En utilisant des simulations de Boltzmann sur réseau, nous étudions un système composé de nageurs sphériques au sein d'un cristal liquide nématique. Nos résultats révèlent que le couplage entre les champs de flux du nageur et l'élasticité cristalline liquide peut déstabiliser l'alignement nématique uniforme. Dans l'espace quasi-2D, nous observons l'émergence d'une instabilité dominée par la flexion avec les propulseurs, ce qui est en accord avec les expériences de bactéries dans des films n

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5

Seyedi, Shila Seyedi. "QFT and Spontaneous Symmetry Breaking." Thesis, Uppsala universitet, Teoretisk fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-425891.

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The aim of this project is to understand the structure of the Standard Model of the particle physics. Therefore quantum field theories (QFT) are studied in the both cases of abelian and non-abelian gauge theories i.e. quantum electrodynamics (QED), quantum chromodynamics (QCD) and electroweak interaction are reviewed. The solution to the mass problem arising in these theories i.e. spontaneous symmetry breaking is also studied.<br>Syftet med detta projekt är att förstå strukturen för partikelfysikens standardmodell. Därför studeras kvantfältsteorier (QFT) i båda fallen av abelska och ic

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6

Sousa, Seixas David de. "Spontaneous symmetry breaking in collective neutrino oscillations." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-176278.

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We explore the phenomenon of spontaneous symmetry breaking in the context of collective neutrino flavor oscillations. Namely, we investigate the spontaneous breaking of isotropy in a homogeneous gas of neutrinos and of azimuthal isotropy in the context of core-collapse supernovae. For the homo- geneous gas, a simple one-dimensional model is analysed in order to demonstrate the phenomenon and understand the connection to the linearized stability analysis. The effect is then investigated in the context of isotropic emission from a supernova core. We show that an azimuthally isotropic flavor conf

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7

Sharan, Ujjawal. "Topology and chiral symmetry breaking in QCD." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302137.

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8

Gebauer, Astrid. "Chiral symmetry breaking transitions in holographic duals." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/206257/.

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Generalisations of the AdS/CFT Correspondence are used to study chiral symmetry breaking in dual gauge theories. We use the D3/D7 and D3/D5 systems to model both 3+1 and 2+1 dimensional, strongly coupled, gauge theories with quark fields. We show that chiral symmetry breaking is induced by either an imposed running coupling/dilaton profile or a background magnetic field. We explore the low energy effective theory of the pions of these models deriving simple integral equations for low energy parameters in the spirit of constituent quark model results. We also explore the phase structure of thes

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9

Smith, John Warren. "Dynamical chiral symmetry breaking in four-fermi theories." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30345.

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Dynamical symmetry breaking of discrete chiral symmetry in four-fermi models is studied. A variational method is used to determine the effective potential. This potential is then examined to determine the critical coupling for which a phase transistion between massless and massive states occurs. Two trial ground states are used in the variational calculation and the results are the same in each case. The first is the ground state of a free massive fermion and the other is a generalized Bogoliobov-Valatin transformation of a free massless fermion ground state. In each case dynamical symmetry br

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10

Cundy, Nigel. "Instantons, topology, and chiral symmetry breaking in QCD." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275509.

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11

Wiedemann, Urs Achim. "Constraints and spontaneous symmetry breaking in quantum field theory." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336764.

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12

Pangon, Vincent. "An RG study of models with spontaneous symmetry breaking." Strasbourg, 2009. http://www.theses.fr/2009STRA6116.

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13

Lundström, Jakob. "Spontaneous symmetry breaking for dipolar Bose-Einstein condensates in multiwell potentials." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150816.

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In this work, dipolar Bose-Einstein condensates in multiwell potentialsplaced to form dierent geometrical structures are studied theoretically inorder to determine how the ground state population of the particles in thepotential wells changes depending on the relative strength of the particlesdipole moment. In the analytical limit (neglecting intersite tunneling), asymmetry-breaking change in the number of wells that are populated byparticles is observed for all studied systems for a certain value of the rela-tive strength of the particles dipole moment. The numerical calculationsfor nonzero i

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14

Almiron, Núria. "Chiral symmetry breaking and pattern selection in chemical and biological systems." Doctoral thesis, Universite Libre de Bruxelles, 1988. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/213330.

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15

Ramos, Elena Garcia. "Investigations of chiral symmetry breaking and topological aspects of lattice QCD." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://dx.doi.org/10.18452/16890.

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Die spontane Brechung der chiralen Symmetrie ist ein faszinierendes Phenomän der QCD mit fundamentalen phänomenologischen Implikationen. Die Brechung der chiral Symmetrie ist beispielsweise verantwortlich für die niedrige Masse der Pionen, welche die effektiven Goldstone Boson der spontan gebrochene Symmetrie sind. Die spontane Brechung der chiral Symmetrie und die chirale Anomalie sind niedrig Energie-Phenomäne der QCD, weshalb nichtperturbative Methoden nötig sind um sie zu studieren. In der vorliegenden Arbeit verwenden wir die Gitterregularisierung der QCD, um das chirale Kondensat, den

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16

Toucas, Guillaume. "Mécanisme de brisure de symétrie chirale pour trois saveurs de quarks légers et extrapolation de résultats de chromodynamique quantique sur réseau." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00754994.

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Dans cette thèse, nous nous intéressons à certains aspects concernant les phénomènes hadroniques à basse énergie sous 1 GeV, en dessous de laquelle la symétrie chirale de la Chromodynamique Quantique (QCD) est spontanément brisée. En dessous de cette échelle d'énergie, le spectre de QCD se réduit à un octet de mésons légers pseudo-scalaires (π, K and η). Mais à cause du confinement, QCD sous 1 GeV devient hautement non perturbative - il n'est donc plus possible de décrire à basse énergie la dynamique de ces mésons en termes de gluons et de quarks (ici seuls les quarks légers u, d et s sont con

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17

Deutschländer, Sven [Verfasser]. "Melting and spontaneous symmetry breaking in two-dimensional colloidal systems / Sven Deutschländer." Konstanz : Bibliothek der Universität Konstanz, 2015. http://d-nb.info/1098136438/34.

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18

Winterer, Felix Simon [Verfasser], and Thomas [Akademischer Betreuer] Weitz. "Spontaneous symmetry-breaking in trilayer graphene / Felix Simon Winterer ; Betreuer: Thomas Weitz." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/1234912031/34.

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19

Carignano, Stefano Verfasser], Michael [Akademischer Betreuer] Buballa, and Jochen [Akademischer Betreuer] [Wambach. "Inhomogeneous chiral symmetry breaking phases / Stefano Carignano. Betreuer: Michael Buballa ; Jochen Wambach." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2012. http://d-nb.info/1106256719/34.

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20

Doi, Takahiro. "Lattice QCD study for the relation between confinement and chiral symmetry breaking." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225399.

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21

Carignano, Stefano [Verfasser], Michael Akademischer Betreuer] Buballa, and Jochen [Akademischer Betreuer] [Wambach. "Inhomogeneous chiral symmetry breaking phases / Stefano Carignano. Betreuer: Michael Buballa ; Jochen Wambach." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2012. http://nbn-resolving.de/urn:nbn:de:tuda-tuprints-31493.

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22

Sousa, Seixas David de [Verfasser], and Georg [Akademischer Betreuer] Raffelt. "Spontaneous symmetry breaking in collective neutrino oscillations / David de Sousa Seixas. Betreuer: Georg Raffelt." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://d-nb.info/1063874955/34.

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23

Wilming, Henrik [Verfasser]. "A Quantum of Thermodynamics : From ground state cooling to spontaneous symmetry breaking / Henrik Wilming." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/117663643X/34.

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24

Cárcamo, Hernández Antonio Enrique. "Composite Vectors and Scalars in Theories of Electroweak Symmetry Breaking." Doctoral thesis, Scuola Normale Superiore, 2011. http://hdl.handle.net/11384/85833.

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In the context of a strongly coupled Electroweak Symmetry Breaking, composite triplet of heavy vectors belonging to the SU(2)L+R adjoint representation and a composite scalar singlet under SU(2)L+R may arise from a new strong interaction invariant under the global SU(2)L x S(2)R symmetry, which is spontaneously broken down to SU(2)L+R. This thesis consists of two parts. The first part is devoted to the study of the heavy composite vector pair production at the LHC via Vector Boson Fusion and Drell-Yan annihilation under the assumption that the interactions among these heavy vector states

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25

Lebedev, Oleg. "Spontaneous CP-Violation in Two Higgs Doublet Supersymmetric Models." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30640.

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An alternative approach to the problem of CP-violation is presented. It is based on the possibility of spontaneous CP-breakdown in models with two Higgs doublets. General features of the phenomenon such as stability of the vacuum and the existence of a light axion are discussed. We investigate the feasibility of spontaneously broken CP in the minimal supersymmetric models - the MSSM and NMSSM. The latter is shown to be experimentally viable. The phenomenological implications of the model such as CP-violating effects in the kaon systems and a nonzero neutron electric dipole moment ar

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26

Capdevilla, Roldan Rodolfo Maia [UNESP]. "Dynamical chiral symmetry breaking: the fermionic gap equation with dynamical gluon mass and confinement." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/92026.

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Made available in DSpace on 2014-06-11T19:25:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-02-28Bitstream added on 2014-06-13T20:53:39Z : No. of bitstreams: 1 capdevillaroldan_rm_me_ift.pdf: 1695600 bytes, checksum: 56f8cc2724bbe924e0b430ebe1a3b24e (MD5)<br>Alguns aspectos da quebra de simetria quiral para quarks na representação fundamental são discutidos no contexto das equações de Schwinger-Dyson. Estudamos a equação de gap fermionica incluindo o efeito de uma massa dinêmica para os gluons. Ao estudar esta equação de gap verificamos que a intenção não é forte o suficiente para

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27

Capdevilla, Roldan Rodolfo Maia. "Dynamical chiral symmetry breaking : the fermionic gap equation with dynamical gluon mass and confinement /." São Paulo, 2013. http://hdl.handle.net/11449/92026.

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Orientador: Adriano Antonio Natale<br>Banca: Adriano Doff Sotta Gomes<br>Banca: Alex Gomes Dias<br>Resumo: Alguns aspectos da quebra de simetria quiral para quarks na representação fundamental são discutidos no contexto das equações de Schwinger-Dyson. Estudamos a equação de gap fermionica incluindo o efeito de uma massa dinêmica para os gluons. Ao estudar esta equação de gap verificamos que a intenção não é forte o suficiente para gerar uma massa dinâmica dos quarks compatível com os dados experimentais. Também discutimos como a introdução de um propagador confinante pode mudar este cenário,

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28

Kokulu, Ahmet. "Eta-eta Prime Mixing In Chiral Perturbation Theory." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609808/index.pdf.

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Quantum Chromodynamics (QCD) is believed to be the theory of strong interactions. At high energies, it has been successfully applied to explain the interactions in accelerators. At these energies, the method used to do the calculations is perturbation theory. But at low energies, since the strong coupling constant becomes large, perturbation theory is no longer applicable. Hence, one needs non-perturbative approaches. Some of these approaches are based on the fundamental QCD Lagrangian, such as the QCD sum rules or lattice calculations. Some others use an effective theory approach to r

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29

Rispler, Manuel Verfasser], Norbert [Akademischer Betreuer] Schuch, and Barbara [Akademischer Betreuer] [Terhal. "Spontaneous symmetry breaking in projected entangled pair state models / Manuel Rispler ; Norbert Schuch, Barbara Maria Terhal." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1162450487/34.

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30

Rispler, Manuel [Verfasser], Norbert Akademischer Betreuer] Schuch, and Barbara [Akademischer Betreuer] [Terhal. "Spontaneous symmetry breaking in projected entangled pair state models / Manuel Rispler ; Norbert Schuch, Barbara Maria Terhal." Aachen : Universitätsbibliothek der RWTH Aachen, 2017. http://d-nb.info/1162450487/34.

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31

Nowakowski, Daniel Verfasser], Michael [Akademischer Betreuer] Buballa, and Jochen [Akademischer Betreuer] [Wambach. "Inhomogeneous chiral symmetry breaking in isospin-asymmetric strong-interaction matter / Daniel Nowakowski ; Michael Buballa, Jochen Wambach." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/1131254228/34.

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32

Nowakowski, Daniel [Verfasser], Michael Akademischer Betreuer] Buballa, and Jochen [Akademischer Betreuer] [Wambach. "Inhomogeneous chiral symmetry breaking in isospin-asymmetric strong-interaction matter / Daniel Nowakowski ; Michael Buballa, Jochen Wambach." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://nbn-resolving.de/urn:nbn:de:tuda-tuprints-61570.

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33

Masiteng, Paulus Lukisi. "Gamma spectroscopy and lifetime measurements in the doubly-odd 194tl nucleus, revealing possible chiral symmetry breaking." University of the Western Cape, 2013. http://hdl.handle.net/11394/3991.

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Philosophiae Doctor - PhD<br>In the first experiment high spin states in 194Tl, excited through the 181Ta (18O, 5n) heavyion fusion evaporation reaction were studied using the AFRODITE array at iThemba LABS. The γ-γ coincidences, RAD ratios and linear polarization measurements were carried out and the previously known level scheme of 194Tl was significantly extended. A total of five rotational bands four of which are new were observed. A pair of rotational bands associated with the πh9/2 ⊗ νi−1 13/2 configuration at lower spins and with the πh9/2 ⊗ νi−3 13/2 configuration at higher spins was

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34

Usai, Alessandro. "Spontaneous CP violation in the next-to-minimal supersymmetric standard model." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323421.

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35

Wilhelm, Franz. "Construction of the Higgs Mechanism and the Lee-Quigg-Thacker-bound." Thesis, Uppsala universitet, Högenergifysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388550.

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In this paper the higgs mechanism for the standard model is constructed in steps. First by considering spontaneous breaking of discrete and continuous global gauge invariance. Then spontaneous breaking of local gauge invariance. These results are then used to construct the electroweak part of the standard model through application of the higgs mechanism. Finally, the LQT-upper bound of 1 TeV for the higgs mass is calculated through unitarity constraints.<br>I denna artikel konstrueras higgsmekanismen i standardmodellen stegvis. Först genom att beakta spontant symmetribrott av diskreta samt kon

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36

Messina, Emanuele. "Non perturbative renormalization of firmion theories." Doctoral thesis, Università di Catania, 2012. http://hdl.handle.net/10761/936.

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The present work is devoted to the study of the non-perturbative renormalization of quantum field theories (QFT) of self-interacting fermions, which is investigated with the help of a fermion Wilsonian RG method. By starting with the appropriate scale dependent action S_k for fermion models and performing a non-trivial extension of previous techniques, a new renormalization group (RG) equation for a generalized N flavors Gross-Neveu model in 2 ¿ d ¿ 4 dimensions is established. The renormalizability of such a model is related to the existence of a non-Gaussian fixed point of the RG equati

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37

Garcia, Ramos Elena [Verfasser], Karl [Akademischer Betreuer] Jansen, Michael [Akademischer Betreuer] Müller-Preußker, and Giancarlo [Akademischer Betreuer] Rossi. "Investigations of chiral symmetry breaking and topological aspects of lattice QCD / Elena Garcia Ramos. Gutachter: Karl Jansen ; Michael Müller-Preußker ; Giancarlo Rossi." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://d-nb.info/1047399180/34.

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38

Garcia-Ramos, Elena [Verfasser], Karl [Akademischer Betreuer] Jansen, Michael [Akademischer Betreuer] Müller-Preußker, and Giancarlo [Akademischer Betreuer] Rossi. "Investigations of chiral symmetry breaking and topological aspects of lattice QCD / Elena Garcia Ramos. Gutachter: Karl Jansen ; Michael Müller-Preußker ; Giancarlo Rossi." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://nbn-resolving.de/urn:nbn:de:kobv:11-100215415.

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39

Böhmer, Christian [Verfasser], and Michael [Akademischer Betreuer] Thies. "Explicit chiral symmetry breaking in Gross-Neveu type models = Explizite chirale Symmetriebrechung in Modelltheorien vom Gross-Neveu Typ / Christian Böhmer. Betreuer: Michael Thies." Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2011. http://d-nb.info/1015475000/34.

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40

Uwaha, Makio. "Simple Models for Chirality Conversion of Crystals and Molecules by Grinding." The Physical Society of Japan, 2008. http://hdl.handle.net/2237/13865.

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41

Hössjer, Emil. "Generalized Abelian Gauge Theory & Generalized Global Symmetry." Thesis, Uppsala universitet, Teoretisk fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-434474.

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We study Cheeger-Simons differential characters in order to define higher form U(1) gauge fields and their Wilson lines. We then go on to define generalized global symmetries. This is a topological formulation of symmetries which has interesting consequences when the charged operators extend through space. Our main source of such charged operators are the generalized Wilson lines. A higher form Noether theorem and a Ward identity are given for transformations of Wilson lines. As examples of quantum field theories with generalized symmetries we cover Sigma models, Maxwell theory and BF-theory.

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42

Uzan, Pierre. "Conscience et physique quantique." Thesis, Paris 4, 2010. http://www.theses.fr/2010PA040153.

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Ce travail a pour objet d'évaluer l'apport de la physique quantique à la compréhension du phénomène de la conscience. Les modèles « classiques » de la conscience proposés actuellement laissent en suspens deux questions importantes: (a) l'explication de la synchronisation de régions éloignées du cerveau qui semble nécessaire à la construction de percepts conscients ; (b) la question du fossé explicatif qui existe entre l'expérience subjective, relevant de ce que le sujet est capable de ressentir de façon privée, et la description de ses corrélats neurophysiologiques dans le langage de la scienc

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Jurkovich, Heitor do Amaral 1990. "Uma introdução à teoria quântica de campos = quebra espontânea de simetria." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277000.

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Orientador: Marcelo Moraes Guzzo<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-24T10:34:02Z (GMT). No. of bitstreams: 1 Jurkovich_HeitordoAmaral_M.pdf: 1327191 bytes, checksum: 56f02396f6172fcf091b0c18db27bd7a (MD5) Previous issue date: 2014<br>Resumo: Nessa dissertação foi estudada a quebra espontânea de simetria desde suas bases mais fundamentais. A quebra espontânea de simetria e o único mecanismo conhecido capaz de gerar massas a uma teoria, preservando as simetrias e sendo renormalizável. Tal proce

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44

Junior, Fernando Martins Antoneli. "Grupos finitos e quebra de simetria no código genético." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/45/45132/tde-07102009-143515/.

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Neste trabalho resolvemos o problema da classicação dos possíveis esquemas de quebra de simetria que reproduzem as degenerescências do código genético na categoria dos grupos finitos simples, contribuindo assim para a busca de modelos algébricos para a evolução do código genético, iniciada por Hornos & Hornos.<br>In this work we solve the problem of classifying the possible symmetry breaking schemes based on simple finite groups that reproduce the degeneracies of the genetic code, thus contributing to the search for algebraic models that describe the evolution of the genetic code, initiated by

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45

Pakalidou, Nikoletta. "Self-assembly of two-dimensional convex and nonconvex colloidal platelets." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/selfassembly-of-twodimensional-convex-and-nonconvex-colloidal-platelets(072e9fad-3e34-4803-b3df-6aed3ce756c7).html.

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One of the most promising routes to create advanced materials is self-assembly. Self-assembly refers to the self-organisation of building blocks to form ordered structures. As the properties of the self-assembled materials will inherit the properties of the basic building blocks, it is then possible to engineer the properties of the materials by tailoring the properties of the building blocks. In order to create mesoscale materials, the self-assembly of molecular building blocks of different sizes and interactions is important. Mesoscopic materials can be obtained by using larger building bloc

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46

Silva, Paulo José Ferreira Porfírio da. "Modelo de dois dubletos de higgs." Universidade Federal da Paraíba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/5756.

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Made available in DSpace on 2015-05-14T12:14:14Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 488644 bytes, checksum: cfa40ce443721729f5648cc16dcec63d (MD5) Previous issue date: 2013-03-07<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>In this dissertation we did a complete review of the StandardModel(SM), emphasizing the weak interactions, this in order to treat an extension of theMP with addition of a doublet of scalar theory, known in the literature asModel with Two Higgs doublets (2HDM). We will treat this model from the point of view of both aspects: whe

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47

Bansal, Sukruti. "Goldstone Fields with Spins Higher than 1/2." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3421854.

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We study three-dimensional non-linear models of vector and vector-spinor Goldstone fields associated with the spontaneous breaking of certain higher-spin counterparts of supersymmetry. The Lagrangians in these models are of a Volkov-Akulov type. Goldstone fields in these models transform non-linearly under the spontaneously broken rigid symmetries. We find that the leading term in the action of the vector Goldstone model is the Abelian Chern-Simons action whose gauge symmetry is broken by a quartic term. As a result, the model has a propagating degree of freedom which, in a decoupling limit, i

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48

Maelger, Jan. "Perturbative perspectives on the Phase diagram of Quantum ChromoDynamics." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX050/document.

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L'étude du diagramme des phases de la Chromodynamique Quantique (QCD) et des transitons associées (déconfinement et restoration de la symétrie chirale) représentent des défis majeurs de la Physique moderne et nombreuses sont les approches théoriques qui visent à en sonder les multiples facettes. Du fait de l'intensité de l'interaction forte dans les régimes d’énergie pertinents pour les transitions susmentionnées, ces approches sont en général de nature non-perturbative, la théorie des perturbations étant réputée inapplicable à ces échelles. Il est, cependant, bien établi que le point de dépar

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Fischer, André. "Advanced Cluster Methods for Correlated-Electron Systems." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-191382.

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In this thesis, quantum cluster methods are used to calculate electronic properties of correlated-electron systems. A special focus lies in the determination of the ground state properties of a 3/4 filled triangular lattice within the one-band Hubbard model. At this filling, the electronic density of states exhibits a so-called van Hove singularity and the Fermi surface becomes perfectly nested, causing an instability towards a variety of spin-density-wave (SDW) and superconducting states. While chiral d+id-wave superconductivity has been proposed as the ground state in the weak coupling limit

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50

Gaydutschenko, Larissa 1987. "Matrizes de massa e violação CP." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278509.

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Orientador: Orlando Luis Goulart Peres<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-23T16:45:26Z (GMT). No. of bitstreams: 1 Gaydutschenko_Larissa_M.pdf: 776013 bytes, checksum: dded3e977e716b07101df7cb392a6b94 (MD5) Previous issue date: 2013<br>Resumo: O fenômeno de oscilação de neutrinos, já experimentalmente observado, só pode ser explicado se a massa dos neutrinos for diferente de zero. No entanto, até pouco tempo atrás, acreditava-se que neutrinos não tivessem massa. O Modelo Padrão das partículas

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