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Rozprawy doktorskie na temat „Finite temperature QCD”

Autor: Grafiati

Data publikacji: 6 września 2023

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1

Cossu, Guido. "Deconfinement transition in QCD at finite temperature." Doctoral thesis, Scuola Normale Superiore, 2009. http://hdl.handle.net/11384/85831.

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The main subject of this thesis is the problem of confinement in QCD. Since the discovery of quarks in high energy experiments, their absence as free particles in nature became one of the hot topics in modern physics. The non abelian gauge field theories developed in the 50s by Yang and Mills and successively generalized in the Standard Model have proved successful in describing the real world. Electroweak and short distance interactions are well explained by perturbative expansions in gauge coupling powers. Perturbative calculations, however, cannot account for the confinement problem

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2

Zhang, Yingwen. "Applications of QCD sum rules at finite temperature." Doctoral thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/30179.

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QCD Sum Rules is one of the most successful quantum field theory frameworks to extract hadronic information from QCD analytically. This technique is based on the Operator Product Expansion (OPE) and Cauchy's Theorem in the complex energy plane. OPE factorizes the short and long distance interactions where the former are calculated using perturbative theory, and the latter are parameterized in terms of the quark and gluon vacuum condensates. By using Cauchy's theorem, the results from QCD calculations can be matched to the hadronic channel, this is known as 'quark-hadron duality'. My Proje

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3

Hatta, Yoshitaka. "The QCD phase transition at finite temperature and density." 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/147809.

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4

Aouane, Rafik. "Gluon and ghost propagator studies in lattice QCD at finite temperature." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16735.

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Die im infraroten Impulsbereich der Quantenchromodynamik (QCD) berechneten Gluon- und Ghost-Propagatoren spielen eine große Rolle für das sogenannte Confinement der Quarks und Gluonen. Sie sind Gegenstand intensiver Foschungen dank nicht-perturbativer Methoden basierend auf Dyson-Schwinger- (DS) und funktionalen Renormierungsgruppen-Gleichungen (FRG). Darüber hinaus sollte es deren Verhalten bei endlichen Temperaturen erlauben, den chiralen und Deconfinement-Phasenübergang bzw. das Crossover in der QCD besser aufzuklären. Unser Zugang beruht auf der gitter-diskretisierten QCD (LQCD), die es

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5

Fetea, Mirela Simona. "Pions and vector mesons at finite temperature from QCD sum rules." Doctoral thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/9694.

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Bibliography: p. 89-92.<br>The temperature corrections to the current algebra Gell-Mann, Oakes and Renner(GMOR) relation in SU(2) X SU(2), the temperature behaviour of the pion mass and the q2 and T dependence of the ρππ vertex function in the space-like region are investigated.

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6

Vuorinen, Aleksi. "The pressure of QCD at finite temperature and quark number density." Helsinki : University of Helsinki, 2003. http://ethesis.helsinki.fi/julkaisut/mat/fysik/vk/vuorinen/.

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7

Burger, Florian. "The finite temperature QCD phase transition and the thermodynamic equation of state." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16679.

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In dieser Arbeit wird mit Hilfe der Gitter-Methode der Phasenübergang/Crossover bei nicht verschwindender Temperatur der Quantenchromodynamik mit zwei Quark Flavour untersucht sowie die thermodynamische Zustandsgleichung berechnet. Es wird dabei die Wilson twisted-mass Formulierung der Quark-Wirkung verwendet, welche hinsichtlich des Kontinuum-Limes eine automatische Verbesserung birgt. Erste belastbare Resultate mit dieser Wirkung bei endlicher Temperatur werden in dieser Arbeit gezeigt. Mehrere kleine Werte der Pion-Masse werden betrachtet mit dem Ziel, Aufschluss über die Ordnung des Phasen

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8

Robaina, Fernandez Daniel [Verfasser]. "Static and dynamic properties of QCD at finite temperature / Daniel Robaina Fernandez." Mainz : Universitätsbibliothek Mainz, 2016. http://d-nb.info/1106573382/34.

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9

Oevers, Manfred [Verfasser]. "The finite temperature phase diagram of 2-flavour QCD with improved Wilson fermions / Manfred Oevers." Bielefeld : Universitätsbibliothek Bielefeld, 1999. http://d-nb.info/1034401254/34.

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10

Heide, Johannes van der. "The pion form factor from lattice QCD a non-perturbative study at zero and finite temperature /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2004. http://dare.uva.nl/document/76697.

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11

Pinke, Christopher [Verfasser], Owe Akademischer Betreuer] Philipsen, Hartmut [Akademischer Betreuer] [Wittig, and Luciano [Akademischer Betreuer] Rezzolla. "Lattice QCD at finite temperature with Wilson fermions / Christopher Pinke. Gutachter: Owe Philipsen ; Hartmut Wittig ; Luciano Rezzolla. Betreuer: Owe Philipsen." Frankfurt am Main : Univ.-Bibliothek Frankfurt am Main, 2014. http://d-nb.info/1058626027/34.

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12

Ghiglieri, Jacopo [Verfasser], Nora [Akademischer Betreuer] Brambilla, and Wolfram [Akademischer Betreuer] Weise. "Effective Field Theories of QCD for Heavy Quarkonia at Finite Temperature / Jacopo Ghiglieri. Gutachter: Nora Brambilla ; Wolfram Weise. Betreuer: Nora Brambilla." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/101486139X/34.

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13

Aouane, Rafik [Verfasser], Michael [Akademischer Betreuer] Müller-Preußker, Christian [Akademischer Betreuer] Fischer, and Ernst-Michael [Akademischer Betreuer] Ilgenfritz. "Gluon and ghost propagator studies in lattice QCD at finite temperature / Rafik Aouane. Gutachter: Michael Müller-Preußker ; Christian Fischer ; Ernst-Michael Ilgenfritz." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://d-nb.info/1034865595/34.

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14

Niblaeus, Carl. "In-medium width of the η' meson". Thesis, Uppsala universitet, Kärnfysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-210687.

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In this master’s thesis the width of the <img src="http://www.diva-portal.org/cgi-bin/mimetex.cgi?%5Ceta'" /> meson is studied as a function of temperature. We consider a background medium consisting of a pion gas and assume a vanishing net baryon chemical potential. The width is obtained in the framework of large <img src="http://www.diva-portal.org/cgi-bin/mimetex.cgi?N_%7Bc%7D" /> chiral perturbation theory and we consider terms up to next-to-leading order in the effective Lagrangian. We use a low-density approximation to calculate the width increase due to scattering with pions from the he

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15

Glesaaen, Jonas Rylund [Verfasser], Owe [Akademischer Betreuer] [Gutachter] Philipsen, and Dirk-Hermann [Gutachter] Rischke. "Heavy quark QCD at finite temperature and density using an effective theory / Jonas Rylund Glesaaen ; Gutachter: Owe Philipsen, Dirk-Hermann Rischke ; Betreuer: Owe Philipsen." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2017. http://d-nb.info/1129254267/34.

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16

Burger, Florian [Verfasser], Michael [Akademischer Betreuer] Müller-Preußker, Maria-Paola [Akademischer Betreuer] Lombardo, and Edwin [Akademischer Betreuer] Laermann. "The finite temperature QCD phase transition and the thermodynamic equation of state : an investigation employing lattice QCD with N f = 2 twisted mass quarks / Florian Burger. Gutachter: Michael Müller-Preußker ; Maria-Paola Lombardo ; Edwin Laermann." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://d-nb.info/1031956018/34.

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17

Berwein, Matthias Wilhelm Georg [Verfasser], Nora [Akademischer Betreuer] [Gutachter] Brambilla, Eric [Gutachter] Braaten, and Norbert [Gutachter] Kaiser. "Heavy Quark-Antiquark Pairs at Zero and Finite Temperature with Effective Field Theories of QCD / Matthias Wilhelm Georg Berwein ; Gutachter: Nora Brambilla, Eric Braaten, Norbert Kaiser ; Betreuer: Nora Brambilla." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1119319161/34.

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18

Frigori, Rafael Bertolini. "Estudo numérico da transição de fase na QCD a temperatura finita." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-12112007-090407/.

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Em nossas simulações, efetuamos uma cuidadosa análise numérica dos algoritmos de Monte Carlos empregados na termalização de teorias de gauge e sistemas de spins contínuos. Dentre eles, apresentamos uma nova proposta que permite reduzir em cerca de 25% os tempos computacionais. Aplicamos este novo algoritmo ao estudo numérico da transição de desconfinamento da teoria de Yang-Mills (YM) SU(2) tridimensional, a temperatura finita, em redes com volumes de 502 X 4 sítios. Por fim, também utilizamos técnicas de Escala de tamanho finito (FSS), Dinâmica de Tempos Curtos e Métodos Variacionais para ext

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19

Pilon, Eric. "Qcd quantitative et photons reels quelques problemes infrarouges en theorie des champs a temperature finie." Paris 11, 1992. http://www.theses.fr/1992PA112162.

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Cette these comprend deux parties distinctes. La premiere concerne l'application quantitative de la chromodynamique quantique (qcd) en physique des hautes energies. Elle contient elle-meme deux volets. Le premier volet porte sur l'importance des corrections qcd d'ordre superieur dans les processus de production a grande impulsion transverse impliquant des photons (quasi) reels. Nos travaux concernent tout d'abord la photoproduction de photons directs au collisionneur electro-proton hera de hamburg, ou nous montrons l'importance des corrections d'ordre superieur a la contribution de fonction de

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20

Antunes, Sérgio M. [UNESP]. "Estudo de sistemas hadrônicos no limite de acoplamento forte da QCD: simetria quiral a densidades e temperaturas finitas." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/132749.

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Made available in DSpace on 2016-01-13T13:27:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2009. Added 1 bitstream(s) on 2016-01-13T13:33:21Z : No. of bitstreams: 1 000854778.pdf: 3101057 bytes, checksum: 2a221f9848604a2f9994cbc7ee409049 (MD5)

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21

Antunes, Sérgio M. "Estudo de sistemas hadrônicos no limite de acoplamento forte da QCD: simetria quiral a densidades e temperaturas finitas /." São Paulo, 2009. http://hdl.handle.net/11449/132749.

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Orientador: Gastão Inácio Krein<br>Banca: Rudnei de Oliveira Ramos<br>Banca: Heron Carlos de Godói Caldas<br>Banca: Sérgio Szpigel<br>Banca: Sandra dos Santos Padula<br>Resumo: Desenvolvemos um formalismo para estudar a quebra dinâmica da simetria quiral na matéria hadrônica em que os quarks e gluons estão confinados no interior dos hádrons. O formalismo emprega as técnicas tradicionais da teoria quântica de muitos corpos em conjunção com a representação Fock-Tani, em que os estados ligados hadrônicos são descritos em termos de operadores de campos que satisfazem regras de comutação canônicas

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22

Costa, Ricardo de Souza. "Estudo do espectro das massas de blingagem de cor em QDC na rede a temperatura finita." Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1207.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Neste trabalho estudamos o espectro das massas de blindagem mais baixas em teorias do tipo Yang_Mills na rede.Utilizamos os grupos de calibre SU(2) e SU(3) em 2+1 e 3+1 dimensões. Os cálculos foram realizados perto da temperatura crítica da transição de fase confinamento-desconfinamento. Obtivemos valores para as razôes entre as massas consistentes com os valores previstos a partir de universidade.<br>In this work we study the spectrum of the lowest screening masses for Yang-Mills theories on the lattice. We used the gauge groups S

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23

Costa, Lúcio Campos [UNESP]. "Estudo da violação das simetrias de Lorentz e CPT na eletrodinâmica quântica." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/102501.

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Made available in DSpace on 2014-06-11T19:32:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-09Bitstream added on 2014-06-13T18:06:49Z : No. of bitstreams: 1 costa_lc_dr_ift.pdf: 1010600 bytes, checksum: bc05c2dfbdfafca45a21ea8884cb5c3f (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Na presente tese, investiga-se uma versão estendida da eletrodinâmica quântica, onde se introduz um termo de acoplamento axial renormalizável não invariante, dando ênfase à quebra dinâmica das simetrias de

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24

Müller, Jens Andreas. "A Dyson-Schwinger Approach to Finite Temperature QCD." Phd thesis, 2011. http://tuprints.ulb.tu-darmstadt.de/2395/1/diss_main.pdf.

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The different phases of quantum chromodynamics at finite temperature are studied. To this end the nonperturbative quark propagator in Matsubara formalism is determined from its equation of motion, the Dyson-Schwinger equation. A novel truncation scheme is introduced including the nonperturbative, temperature dependent gluon propagator as extracted from lattice gauge theory. In the first part of the thesis a deconfinement order parameter, the dual condensate, and the critical temperature are determined from the dependence of the quark propagator on the temporal boundary conditions. The chiral t

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25

Liu, Kun-Min, and 劉崑民. "Monte Carlo Simulation of Quenched QCD at Finite Temperature." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/23216749742412852511.

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碩士<br>國立臺灣大學<br>物理研究所<br>99<br>In this thesis, we study the finite temperature phase transition of the pure SU(3) gauge theory. We use the hybrid Monte Carlo method to simulate the quenched QCD at finite temperature, with Wilson gauge action on the 16^3 × 6 lattice. From the Polyakov loop and its susceptibility, we determine the value of the critical temperature Tc = 274 ± 1 MeV, in agreement with the widely accepted value of Tc ~ 270 MeV for pure SU(3) gauge theory.

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26

Kwon, Youngshin [Verfasser]. "QCD sum rule studies at finite density and temperature / Youngshin Kwon." 2009. http://d-nb.info/1000455432/34.

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27

Müller, Jens Andreas [Verfasser]. "A Dyson-Schwinger approach to finite temperature QCD / von Jens Andreas Müller." 2011. http://d-nb.info/1010056522/34.

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28

Thakkar, Rishabh. "Mesonic screening mass at zero and finite chemical potential." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5980.

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The finite temperature analysis of QCD is challenging since perturbation theory is not applicable in that regime. A non-perturbative method like lattice QCD is thus required to obtain an estimate of the necessary observables. In this Ph.D. thesis, we study the symmetries of the chiral phase transition and its transition temperature. This is undertaken by measuring the screening masses of those mesons that rotate amongst themselves under the symmetries. Firstly, we discuss the regime of zero chemical potential where it is easy to obtain the correlators using which we calculate the meson scre

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29

Ding, Heng-Tong [Verfasser]. "Charmonium correlation and spectral functions in quenched lattice QCD at finite temperature / vorgelegt von Heng-Tong Ding." 2010. http://d-nb.info/1009957759/34.

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