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Thèses sur le sujet « Quarks »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 25 juillet 2025

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1

Caron, Huot Simon 1984. "Heavy quark energy losses in the quark-gluon plasma : beyond leading order." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112385.

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We compute, to next-to-leading order in perturbation theory, the rate of energy loss suffered by a heavy quark moving nonrelativistically in the quark-gluon plasma. This quantity is essentially a measure of the scattering rates of this quark against plasma constituents, and of their efficiency in slowing it down. The next-to-leading order correction is sensitive to the physics of overlapping scatterings, as well as to the self-interactions of gauge fields with small momenta (of order the electric screening scale). We find the next-to-leading order correction to be remarkably large, suggesting

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2

BASTOS, Cristiano Costa. "Química com quarks." Universidade Federal de Pernambuco, 2007. https://repositorio.ufpe.br/handle/123456789/8777.

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Made available in DSpace on 2014-06-12T23:02:16Z (GMT). No. of bitstreams: 2 arquivo9222_1.pdf: 779195 bytes, checksum: 1ff165d01044759c3b3677b289c45f66 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2007<br>Algumas propriedades da química de quarks podem ser obtidas realizando cálculos ab initio Hartree-Fock para átomos com carga nuclear fracionária e moléculas formadas por estes átomos. Obtivemos o estado fundamental e o primeiro estado excitado para os átomos de sódio, lítio, berílio e magnésio interagentes com quarks. Isto sugere

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3

Wünsch, Rudi, and Mathias Schleif. "The Chiral Quark-Loop Soliton in a Hot Gas of Constituent Quarks." Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-31115.

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We consider a chiral one-loop hedgehog soliton of the bosonized SU(2)f Nambu & Jona-Lasinio model which is embedded in a liot medium of constituent quarks. Energy and radius of the soliton are determined in self-consistent mean-field approximation. Quasi-classical corrections to the soliton energy are derived by means of the pushing and cranking approaches. The corresponding inertial parameters are evaluated. It is shown that the inertial mass is equivalent to the total internal energy of the soliton. Corrected nucleon and ∆ isobar masses are calculated in dependence on temperature and density

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4

Wünsch, Rudi, and Mathias Schleif. "The Chiral Quark-Loop Soliton in a Hot Gas of Constituent Quarks." Forschungszentrum Rossendorf, 1997. https://hzdr.qucosa.de/id/qucosa%3A21938.

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We consider a chiral one-loop hedgehog soliton of the bosonized SU(2)f Nambu & Jona-Lasinio model which is embedded in a liot medium of constituent quarks. Energy and radius of the soliton are determined in self-consistent mean-field approximation. Quasi-classical corrections to the soliton energy are derived by means of the pushing and cranking approaches. The corresponding inertial parameters are evaluated. It is shown that the inertial mass is equivalent to the total internal energy of the soliton. Corrected nucleon and ∆ isobar masses are calculated in dependence on temperature and density

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5

Smith, Jason. "Quarks and antiquarks in nuclei /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/9750.

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6

Veiga, J. S. "Propriedades da matéria nuclear em modelos de quarks constituintes /." São Paulo, 1996. http://hdl.handle.net/11449/132865.

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7

Devlin, Francis Robert. "Physics of heavy quarks." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319786.

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8

Julien, Jean Marc. "Structure du noyau, particules élémentaires : Les quarks : ultimes entités de la matière." Paris 5, 1988. http://www.theses.fr/1988PA05P060.

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9

Leyva, Alfonso. "Strahlungskorrekturen zu Polarisationsobservablen schwerer Quarks." [S.l. : s.n.], 2000. http://ArchiMeD.uni-mainz.de/pub/2000/0128/diss.pdf.

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10

Higuchi, Katsuichi. "Electroweak Interaction with Singlet Quarks." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/152527.

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11

Sánchez, Carlos Andrés. "Measurement of the Top Quark Mass with Neural Networks." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1039046089.

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12

Coci, Gabriele. "Probing the Quark-Gluon Plasma properties through Heavy Quarks' dynamics: transport coefficients and elliptic flow." Doctoral thesis, Università di Catania, 2018. http://hdl.handle.net/10761/4190.

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Quantum Chromodynamics (QCD) is the non-abelian gauge field theory that within the Standard Model describes the strong interaction between quarks and gluons. QCD exhibits two main properties:confinement and asymptotic freedom. The former implies that in ordinary matter quarks and gluons are bounded within colorless hadrons. The latter is related to the decrease of the QCD strength coupling with increasing characteristic energy of the process. Asymptotic freedom implies that under extreme conditions of high temperature and density the interaction affecting quarks and gluons is so weakly that th

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13

Guiot, Benjamin. "Production de charms et de photons prompts avec le générateur d'évènements EPOS." Thesis, Nantes, Ecole des Mines, 2014. http://www.theses.fr/2014EMNA0192/document.

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Au LHC, la collision de particules de très hautes énergies permet d’étudier l’interaction forte. En particulier, lors de la collision de deux noyaux (de plomb pour le LHC), un nouvel état de la matière, appelé Plasma de Quarks Gluons (QGP), est créé. L’étude de ce QGP constitue actuellement un des domaines actif de la recherche en physique. Les sondes dures, telles les quarks lourds ou les photons prompts, sont produit dés les premiers instants des collisions faites au LHC. Cette caractéristique les rend idéales pour l’étude du QGP. Elles vont traverser et interagir avec le milieu créé. En com

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14

Hadjimichef, Dimiter. "Formalismo de Fock-Tani para a física hadrônica /." São Paulo, 1995. http://hdl.handle.net/11449/132802.

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Orientador: Gastão Inácio Krein<br>Banca: Mahir Saleh Hussein<br>Banca: Yogiro Hama<br>Banca: Eliane Angela Veit<br>Banca: Rogério Rosenfeld<br>Resumo: O formalismo de teoria de campos Fock-Tani, o qual foi originalmente desenvolvido na física atômica para tratar sistemas em que os graus de liberdade internos dos átomos não podem ser desprezados, é generalizado para sistemas de hádrons compostos. Partindo da representação no espaço de Fock dos estados hadrônicos num modelo de quarks, uma mudança de representação é implementada de tal maneira que os hádrons sejam descritos por operadores de cam

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15

Mauser, Marcus. "Polarisationseffekte in semileptonischen Zerfällen schwerer Quarks." [S.l. : s.n.], 2001. http://ArchiMeD.uni-mainz.de/pub/2001/0051/diss.pdf.

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16

Jain, Ambar. "Heavy quarks in effective field theories." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53228.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 279-290).<br>Heavy quark physics serves as a probe to understand QCD, measure standard model parameters, and look for signs of new physics. We study several aspects of heavy quark systems in an effective field theory framework, including both phenomenological and formal applications. Phenomenological applications include the leading calculation of penguin amplitudes in charmless non-leptonic B-decays to light mesons, including power

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17

Enström, Daniel. "Aspects of quarks in exotic matter." Licentiate thesis, Luleå tekniska universitet, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16915.

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In this licentiate thesis, two different aspects of particle physics have been studied. The results are presented in four papers. In papers I and II, a model for a joint origin of gamma-ray bursts and dark matter is presented. The common denominator is the deconfined state of quarks, the Quark-Gluon Plasma (QGP). We propose that such quark objects surviving the quark-hadron transition in the early universe, constitute the dark matter and that mergers of these objects are the inner engine of gamma-ray bursts. We have computed stability criteria for macroscopic quark objects, as well as the merg

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18

Geng, Chaqiang. "Composite models of quarks and leptons." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/76097.

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We review the various constraints on composite models of quarks and leptons. Some dynamical mechanisms for chiral symmetry breaking in chiral preon models are discussed. We have constructed several "realistic candidate" chiral preon models satisfying complementarity between the Higgs and confining phases. The models predict three to four generations of ordinary quarks and leptons.<br>Ph. D.

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19

Boyd, Graham John. "Quarks and hadrons on the lattice." Master's thesis, University of Cape Town, 1990. http://hdl.handle.net/11427/15902.

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Bibliography: p. 159-166.<br>There is a short introduction to the ideas of lattice theory, followed by an equally brief look at pure gauge QCD on the lattice. More details for either of these may be found in the references cited in each section, as well as in [143]. The bulk of this work deals with the problems encountered in placing fermions on to the lattice, and the techniques used for this purpose. The Nielsen-Ninomiya theorem is introduced, with a detailed treatment thereof relegated to an appendix. The two main fermion techniques, due to Wilson (1974); and Kogut and Susskind (1975) are d

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20

Agudelo, David Felipe Tamayo. "Materia de quarks a temperatura finita." reponame:Repositório Institucional da UFSC, 2013. https://repositorio.ufsc.br/handle/123456789/106802.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Física, Florianópolis, 2013<br>Made available in DSpace on 2013-12-05T22:23:58Z (GMT). No. of bitstreams: 1 318335.pdf: 3639601 bytes, checksum: 3015447719eab188881d3532f1267586 (MD5) Previous issue date: 2013<br>A constitução dos objetos estelares continua sendo fonte de especulação. Varias hipótesis têm sido aventadas com relação a estrutura interna dos pulsares. Uma delas basei-se na conjetura de Bodmer-Witten, de que a altas densidades a matéria mias est

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21

Moniez, Marc. "Recherche du quark top auprès du détecteur UA2 au collisionneur proton-antiproton du CERN." Paris 11, 1988. http://www.theses.fr/1988PA112214.

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Cette thèse expose les résultats de la recherche du quark top à l'expérience UA2 du CERN, dans les collisions proton-antiproton aux énergies de 546 GeV et 630 GeV dans le centre de masse, pour une luminosité intégrée de 894 nb-1. Un signal provenant de la désintégration semi-leptonique du quark top (t donne b +électron+ neutrino) a été recherché dans les ensembles d'événements qui contiennent un électron identifié dans l'appareillage et 0,1 ou 2 jets. L'étude détaillée des bruits de fond expérimentaux dus à une mauvaise identification des électrons a été menée ; de même, les sources connues d'

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22

Chan, Ying-kit. "Strange star cooling." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B3138254X.

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23

Chan, Ying-kit, and 陳英傑. "Strange star cooling." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B3138254X.

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24

Veiga, J. S. [UNESP]. "Propriedades da matéria nuclear em modelos de quarks constituintes." Universidade Estadual Paulista (UNESP), 1996. http://hdl.handle.net/11449/132865.

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Made available in DSpace on 2016-01-13T13:28:16Z (GMT). No. of bitstreams: 0 Previous issue date: 1996. Added 1 bitstream(s) on 2016-01-13T13:31:40Z : No. of bitstreams: 1 000147986.pdf: 3091262 bytes, checksum: 52c85a892e15d474b1f6a01e37991695 (MD5)

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25

Lees, Jean-Pierre. "Recherche du quark Top dans l'expérience UA1 par l'étude des événements contenant un électron isolé de grande impulsion transverse accompagné de jets." Chambéry, 1987. http://www.theses.fr/1987CHAMS003.

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26

Strandberg, Jonas. "Top Quarks at the Tevatron : Measurements of the Top Quark Production and Decay with the D0 Experiment." Doctoral thesis, Stockholm University, Department of Physics, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-879.

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<p>This thesis presents two measurements of the top quark using 230 pb-1 of data taken with the D0 detector at the Tevatron accelerator. The first measurement determines the top pair production cross section at sqrt(s)=1.96 TeV in proton-antiproton collisions. In the standard model of particle physics the top quark decays almost exclusively into a W boson and a b quark. Candidate events are selected by requiring that at least one jet in the event is tagged with the secondary vertex algorithm. The measured top pair production cross section is:</p><p>8.6 +1.6-1.5 (stat. + syst.) +- 0.6 (lumi.) p

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27

Strandberg, Jonas. "Top quarks at the Tevatron : measurements of the top quark production and decay with the DØ Experiment /." Stockholm : Dept. of Physics, Stockholm university, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-879.

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28

Isert, Dagmar Sigrun. "Transport theory for scalar quarks and gluons." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=961877200.

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29

Webster, Stephen James. "Improved Monte Carlo simulations of massive quarks." Thesis, Durham University, 2019. http://etheses.dur.ac.uk/12954/.

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Motivated by the interest in top and bottom quark production processes at the LHC, we study the simulation of heavy quarks in the Herwig 7 Monte Carlo event generator. We first present a much improved treatment of heavy quarks in the dipole shower in Herwig 7 and extend the shower to handle decays of massive coloured particles. Taking advantage of these developments, we perform an in-depth study of the simulation of top quark pair production at the LHC, paying particular attention to the parton shower and matching uncertainties involved. Next we implement an algorithm in the dipole shower to i

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30

Martins, Mauro Sebastião. "História das partículas: de elétrons aos quarks." Pontifícia Universidade Católica de São Paulo, 2008. https://tede2.pucsp.br/handle/handle/13384.

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Made available in DSpace on 2016-04-28T14:16:32Z (GMT). No. of bitstreams: 1 Mauro Sebastiao Martins.pdf: 805307 bytes, checksum: bf96e1e0d841ef228e79449796e6fd6b (MD5) Previous issue date: 2008-05-13<br>This Work, a thesis in history of subatomic particles, is an historic and epistemological development study of the theoretical and experimental subatomic particles and antiparticles from the early Dirac s quantum theory of the electron, published in a year of 1928, until the publications of the theories of the quarks in a decade of the sixths, the Gell Mann theory of quarks include. That r

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31

Prager, Hugo. "Phenomenology of extra quarks at the LHC." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/424495/.

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In this thesis, we study in a model independent way models of new Physics featuring extra quarks (XQs). These quarks are predicted by several extensions of the Standard Model (SM) but have never been observed yet even though many searches have been designed to find them at the Large Hadron Collider (LHC). After an introduction about the SM and the LHC, we present the main properties of these XQs and a model independent parametrisation that can be used to describe their phenomenology with generic hypotheses about their mixing with SM quarks, both in the case of XQ coupling with SM bosons and wi

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32

GIRLANDA, LUCA. "Signature experimentale de la condensation de quarks." Paris 11, 1999. http://www.theses.fr/1999PA112258.

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Cette these est dediee a l'etude du mecanisme de la brisure spontanee de la symetrie chirale en qcd. En particulier on a voulu mettre en evidence le role du parametre d'ordre le plus simple, le condensat de quarks <$$q>. Apres avoir decrit differents scenarios possibles de la structure en phases du vide de la qcd, comme fonction du nombre de saveurs de masse nulle n f et de couleurs n c, nous nous sommes concentres sur le cas n f = 2. Afin d'inspecter systematiquement la sensibilite des processus physiques a la valeur du condensat <$$att$$q>, nous avons construit et renormalise, a l'ordre d'un

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33

Al, Mamun Md Abdullah. "Nuclei, Nucleons and Quarks in Astrophysical Phenomena." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1563991151449461.

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34

Lasry, Nathaniel. "Mélange des quarks : une nouvelle approche géométrique /." Thèse, Montréal : Trois-Rivières : Université du Québec à Montréal, Université du Québec à Trois-Rivières, 2000. http://www.uqtr.ca/biblio/notice/resume/03-2224587R.html.

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Mémoire (M.Sc.)--Université du Québec à Montréal, 2000.<br>En tête du titre: Université du Québec à Montréal. "Mémoire présenté à l'Université du Québec à Trois-Rivières comme exigence partielle de la maîtrise en physique offerte par extension à l'Université du Québec à Montréal en vertu d'un protocole d'entente avec l'Université du Québec à Trois-Rivières". CaQTU CaQTU Bibliogr. : f. 74.

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35

Garcia, André Felipe. "Transição quiral na matéria de quarks magnetizada." Florianópolis, 2012. http://repositorio.ufsc.br/xmlui/handle/123456789/100419.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Física<br>Made available in DSpace on 2013-06-25T19:00:58Z (GMT). No. of bitstreams: 1 311322.pdf: 5230146 bytes, checksum: 30f7940fb6addda231c03960c74fb1ca (MD5)<br>A física de altas energias é um dos campos de pesquisa mais interessantes da física e de maior atividade atualmente, abrangendo fenômenos físicos que vão desde cosmologia até a física de partículas elementares. Nesta última, sua atuação se dá principalmente nos modernos aceleradores de partículas,

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36

Paulo, Júnior Ademar. "Interações efetivas entre quarks a baixas energias a partir da Cromodinâmica Quântica considerando o condensado de quark-antiquark." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/3064.

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Submitted by Jaqueline Silva (jtas29@gmail.com) on 2014-09-15T18:48:07Z No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Ademar Paulo Júnior.pdf: 470454 bytes, checksum: ca666cb4df9cfed260dd792d9b884664 (MD5)<br>Approved for entry into archive by Jaqueline Silva (jtas29@gmail.com) on 2014-09-15T18:48:28Z (GMT) No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Ademar Paulo Júnior.pdf: 470454 bytes, checksum: ca666cb4df9cfed260dd792d9b884664 (MD5)<br>Made available in DSpace on 2014-09-15T18:48:28Z

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Gil, Jhon Andersson Rosero. "Decaimento eletrofraco da matéria de quarks no interior das estrelas de nêutrons." reponame:Repositório Institucional da UFABC, 2014.

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Orientador: Prof. Dr. Germán Lugones<br>Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Física, 2014.<br>Neste trabalho, estudamos a transicao de fase de materia hadronica a materia quarks em estrelas de neutrons e proto-estrelas de neutrons. A transicao comeca com o deconfinamento dos hadrons, que e governado pelas interacoes fortes, e e seguido pelo decaimento fraco dos quarks ate que a materia de quarks atinge o equilibrio quimico. Calculamos a taxa de todos os processos de interacao fraca relevantes na materia quarks quente e densa e resolvemos a equacao

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38

Samways, Benjamin. "A lattice measurement of the B*Bπ coupling using DWF light quarks and the relativistic heavy quark action". Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/361526/.

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I describe a calculation of the B*Bπ coupling in lattice QCD. The B*Bπ coupling is directly related to gb, the leading order low-energy interaction constant of heavy meson chiral perturbation theory. Knowledge of the coupling will help decrease systematic uncertainties in lattice QCD B-physics studies, which are important to constrain the CKM matrix and probe the Standard Model. This calculation is performed with 2+1 flavours of dynamic quarks using the domain wall fermion action. To simulate the heavy b-quark I use a non-perturbatively tuned relativistic heavy quark action which keeps discret

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39

Gimenez, Diógenes Domenicis. "Estudo da coincidência elétron-jato em colisões próton-próton e próton-núcleo no experimento ALICE." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-13032018-134433/.

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Esta tese apresenta um estudo inédito da distribuição de jatos correlacionados com elétrons provenientes de decaimentos de quarks pesados (HFe), reconstruídos e selecionados com o ALICE (A Large Ion Collider Experiment, em inglês). Os observáveis foram medidos em colisões pp com energia do centro de massa s = 8 TeV e em colisões p-Pb a sNN = 5.02 TeV, no LHC (Large Hadron Collider, em inglês). Estudar os quarks pesados formados durante as colisões relativísticas entre íons pesados é uma importante maneira para estudar o meio formado, conhecido como QGP (Quark Gluon Plasma, em inlgês). Isso se

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40

Harko, Tiberiu. "Properties of strange stars." Thesis, Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B23242280.

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41

Turcotte, Marc Gilles. "Weak decays of charmed particles." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72805.

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42

Hazelton, William Donald. "Configuration mixing of quark states in nucleons and other baryons in the MIT bag model /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9770.

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Roy, Christelle. "L'Etrangeté du Plasma de Quarks et de Gluons." Habilitation à diriger des recherches, Université de Nantes, 2005. http://tel.archives-ouvertes.fr/tel-00011076.

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A l'instar des trois autres expériences auprès du collisionneur RHIC (Relativistic Heavy Ion Collider) du Brookhaven National Laboratory près de New York, STAR (Solenoidal Tracker At RHIC) est entièrement consacrée à la mise en évidence de cet état particulier de la matière nucléaire prédit par les calculs de QCD (Quantum ChromoDynamics) sur réseau : le plasma de quarks et de gluons (QGP pour Quark Gluon Plasma). Cet état, supposé être celui de l'Univers quelques fractions de secondes après le Big Bang, consisterait d'après sa définition originelle de 1975, en une matière dans laquelle quarks

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Perret, Pascal. "Tests électrofaibles du Modèle Standard et quarks lourds." Habilitation à diriger des recherches, Université Blaise Pascal - Clermont-Ferrand II, 2002. http://tel.archives-ouvertes.fr/tel-00001683.

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Andrieux, Vincent. "Polarisation of quarks and gluons inside the nucleon." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112244/document.

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Cette thèse présente un travail relatif à l'étude de la structure en spin longitudinal du nucléon. Le but est de déterminer la contribution des constituants du proton, quarks et gluons, à la formation de son spin 1/2. L'analyse s'appuie sur les données de l'expérience COMPASS qui bénéficie d'un faisceau de muons polarisés à 200 GeV diffusé sur les protons polarisés d'une cible d'ammoniac (NH₃) de 1,2 m de long. On mesure l'asymétrie de spin longitudinal des sections efficaces de diffusion profondément inélastique. On extrait la fonction de structure en spin du proton, g₁p, étendant la couvertu

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Mello, Cedrick Miranda. "Estudo da detecção de quarks top no LHC." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-08032013-122617/.

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Este trabalho consistiu em analisar a possibilidade de verificação da violação de sabor em correntes neutras intermediadas por glúons de Kaluza-Klein (GKK) através do modelo de dimensões extras compactas e curvas. Este introduz a possibilidade de violação de sabores em correntes neutras através de processos do tipo próton/próton em top/anti-quark c. Inicialmente estudamos o comportamento de jatos com altos momentos transversos (da ordem de 300 GeV) e suas subestruturas. Após isto, estudamos a detecção do quark top através dos algoritmos HEPTopTagger e Johns Hopkins (fizemos uma breve compar

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Motta, Théo Ferraz. "Matéria de Quarks fria sob campo magnético forte." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-25052017-105222/.

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Esta dissertação apresenta uma breve revisão introdutória de alguns aspectos importantes de astrofísica nuclear e da fenomenologia do plasma de quarks e glúons a baixas temperaturas. Acredita-se que tal estado da matéria existe no núcleo de estrelas de nêutron e possivelmente de outros objetos compactos em astrofísica. Uma equação de estado para tal sistema é derivada incluindo as influências dos condensados de glúon e do campo magnético que também é uma característica importante das estrelas de nêutron. Finalmente, essa equação de estado é aplicada para o estudo de estrutura estelar de estrel

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Carvalho, Sheyse Martins de. "Efeitos do confinamento na matéria de quarks supercondutora." Instituto Tecnológico de Aeronáutica, 2010. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=1564.

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No regime de altas densidades, os modelos de quarks com geração dinâmica de massa prevêem que a matéria estranha de quarks pode aparecer em duas fases, uma fase quiral simétrica e outra quebrada que não é absolutamente estável. A altas densidades, a abundância dos quarks u, d e s é a mesma na fase quiral simétrica e não há elétrons. Estas duas propriedades também estão presentes numa nova fase supercondutora que deve ocorrer na QCD a altas densidades, conhecida como fase fechada de cor e sabor (CFL). Isto sugere que a matéria estranha a altas densidades possa fazer uma transição para fase CFL,

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Tran, Huong Lan. "Recherche de quarks lourds avec le détecteur ATLAS." Paris 7, 2013. http://www.theses.fr/2013PA077274.

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Une recherche de quarks lourds est presentée dans cette these. Elle est composée de trois parties principales. Dans la première partie est presentée l'étude du facteur de qualité Q pour les calorimètres à Argon liquide de ATLAS. Le facteur Q est une quantité définie pour estimer l'accord entre le signal mesuré et la prédiction. Dans le cas où la prédiction n'est pas parfaite, il peut induire un rejet de bons signaux. La prédiction peut cependant être corrigée en utilisant des signaux purs d'ionisation selectionnés dans les données. Les résultats montrent une bonne amélioration: La correction d

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Khamseh, Ava. "Lattice phenomenology of heavy quarks using dynamical fermions." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28855.

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The Standard Model of particle physics is believed to be only the low energy limit of a more fundamental theory. In order to determine its range of validity, a major part of theoretical and experimental efforts in physics is dedicated to precision tests of the Standard Model. Lattice QCD is a non-perturbative, first-principles approach to Quantum Field Theory. It plays an important role in flavor physics by providing calculations of non-perturbative strong interaction contributions to weak processes involving quarks. Measurements of hadronic quantities can be used to constrain the Standard Mod

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