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Dissertations / Theses on the topic 'Lattice formulation of QCD'

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Published: 4 June 2021

Last updated: 5 February 2022

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1

Ford, I. J. "Aspects of pure quantum chromodynamics on large lattices." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382631.

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2

Luz, Fernando Henrique e. Paula da. "Implementação do software MILC no estudo da QCD completa." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-23042010-081643/.

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A CromoDinâmica Quântica (QCD) é a teoria quântica de campos que descreve as interações fortes entre quarks, que são os constituintes fundamentais das partículas do núcleo atômico. Devido ao caráter peculiar destas interações, o estudo da QCD não pode ser realizado pelos métodos usuais em teorias quânticas de campos, baseados em expansões perturbativas. O estudo não-perturbativo da QCD a partir de primeiros princípios torna-se possível através da formulação de rede da teoria, que equivale a um modelo de mecânica estatística clássica, para o qual podem ser realizadas simulações numéricas atravé

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3

Serenone, Willian Matioli. "Potencial de quarks pesados com input de teorias de gauge na rede." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-24092014-163411/.

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Nesta dissertação nós revisamos aspectos gerais de teorias de gauge, os princípios da formulação de rede da cromodinâmica quântica (QCD) e algumas propriedades de quarkônios pesados, i.e. estados ligados de um quark pesado e seu antiquark. Como um exemplo de simulações de Monte Carlo de modelos de rede, apresentamos aplicações nos casos do oscilador harmônico e teorias de gauge SU(2). Nós estudamos o efeito de incorporar o propagador de gluon de simulações na rede em um modelo de potencial para a descrição do quarkônio, no caso do botômomio e do charmônio. Nós usamos em ambos os casos uma abor

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4

Pickles, Stephen M. "Algorithms in lattice QCD." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/11256.

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The enormous computing resources that large-scale simulations in Lattice QCD require will continue to test the limits of even the largest supercomputers into the foreseeable future. The efficiency of such simulations will therefore concern practitioners of lattice QCD for some time to come. I begin with an introduction to those aspects of lattice QCD essential to the remainder of the thesis, and follow with a description of the Wilson fermion matrix M, an object which is central to my theme. The principal bottleneck in Lattice QCD simulations is the solution of linear systems involving M, and

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5

Skullerud, Jon Ivar. "Renormalisation in lattice QCD." Thesis, University of Edinburgh, 1996. http://hdl.handle.net/1842/12965.

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This thesis investigates various aspects of the relation between the lattice and continuum formulations of quantum field theories, in particular QCD. The aim of this is to gain a better insight into the theory of QCD, and to be able to relate more accurately the numbers obtained from lattice simulations to experimental values for physical quantities. The first part of this thesis (chapters 1 and 2) gives a general introduction to quantum field theory, with emphasis on the lattice formulation of QCD. The first chapter describes the functional integral formulation of gauge theories and how it ca

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6

Simpson, Alan David. "Algorithms for lattice QCD." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/12946.

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Quantum Chromodynamics (QCD) is the present theory of the strong interactions between quarks and gluons. To simulate QCD on a computer we need to discretise the field theory onto a space-time lattice. After outlining the standard Wilson action for lattice QCD, we describe the improved Clover fermion action with reduced discretisation errors. This thesis describes various techniques required to simulate lattice QCD and their implementation on the UKQCD Grand Challenge supercomputer Maxwell, which is a parallel computer consisting of 64 nodes. The ideas behind Monte Carlo (MC) simulation are int

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7

Bonnet, Frédéric D. R. "Improved actions in lattice QCD /." Title page, contents and introduction only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phb717.pdf.

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8

McCallum, Paul. "Upsilon spectroscopy using lattice QCD." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363170.

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9

Johnson, Christopher Andrew. "Fermion determinants in lattice QCD." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250410.

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10

Campbell, N. A. "Static potentials in lattice QCD." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377123.

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11

Burford, Darren Ross. "Hadronic physics in lattice QCD." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242536.

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12

Gambhir, Arjun Singh. "Disconnected Diagrams in Lattice Qcd." W&M ScholarWorks, 2017. https://scholarworks.wm.edu/etd/1516639772.

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In this work, we present state-of-the-art numerical methods and their applications for computing a particular class of observables using lattice quantum chromodynamics (Lattice QCD), a discretized version of the fundamental theory of quarks and gluons. These observables require calculating so called "disconnected diagrams" and are important for understanding many aspects of hadron structure, such as the strange content of the proton. We begin by introducing the reader to the key concepts of Lattice QCD and rigorously define the meaning of disconnected diagrams through an example of the Wick co

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13

Dinter, Simon. "Nucleon structure from lattice QCD." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2012. http://dx.doi.org/10.18452/16629.

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In dieser Arbeit berechnen wir mit Hilfe der Gitter-QCD Observablen, die in Beziehung zur Struktur des Nukleons stehen. Ein Teil dieser Arbeit beschäftigt sich mit Momenten von Parton-Verteilungsfunktionen. Solche Momente sind wichtig für das Verständnis der Nukleon-Struktur und werden durch globale Analysen von tief-inelastischen Streuexperimenten bestimmt. Eine theoretische, nicht-perturbative Rechnung der Momente in der Gitter-QCD ist möglich. Allerdings existiert, seit solche Gitter-QCD Rechnungen vorliegen, eine Diskrepanz zwischen diesen Rechnungen und den Ergebnissen globaler A

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14

Fukaya, Hidenori. "Lattice QCD with fixed topology." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144178.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(理学)<br>甲第12095号<br>理博第2989号<br>新制||理||1446(附属図書館)<br>23931<br>UT51-2006-J90<br>京都大学大学院理学研究科物理学・宇宙物理学専攻<br>(主査)助教授大野木哲也, 教授二宮正夫, 教授畑浩之<br>学位規則第4条第1項該当

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15

Roweth, Duncan. "Parallel algorithms for lattice QCD." Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/12886.

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16

Warkentin, Nikolaus. "Nucleon wave function from lattice QCD." kostenfrei, 2008. http://www.opus-bayern.de/uni-regensburg/volltexte/2008/1006/.

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17

Kendall, Iain D. "Lattice QCD studies of Upsilon physics." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/2280/.

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Non-Relativistic QCD (henceforth NRQCD) is a non-relativistic effective theory that models the strong interaction. We use this formulation to perform lattice simulations of the bound states of b quarks, known as the Upsilon spectrum. These simulations are performed on a range of gauge ensembles provided by the MILC collaboration that include three flavours of quark content - one at the approximate mass of the strange quark, and two degenerate flavours that range from about a half to a tenth of the mass of the strange quark. We implement a random wall algorithm in the creation of our b quark pr

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18

Stella, Nicoletta. "Heavy baryon phenomenology from lattice QCD." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242393.

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19

Hill, Victor John. "Heavy flavour physics from lattice QCD." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252696.

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20

Heatlie, Grant James. "Aspects of phenomenology from lattice QCD." Thesis, University of Southampton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303058.

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21

Bär, Oliver. "Chiral perturbation theory for lattice QCD." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2011. http://dx.doi.org/10.18452/13976.

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Eine zusammenfassende Übersicht über die Formulierung der chiralen Störungstheorie (ChPT) für die Gitter Quantenchromodynamik (QCD) ist gegeben. Wir beginnen mit kurzen Zusammenfassungen der chiralen Störungstheorie für die Kontinuum-QCD sowie Symanziks effektiver Theorie für die Gitter-QCD. Anschließend wird die Formulierung der ChPT für die Gitter-QCD behandelt. Nach einem weiteren Kapitel über partial quenching und Theorien mit gemischten Wirkungen werden konkrete Anwendungen diskutiert: Wilson ChPT, staggered ChPT sowie Wilson ChPT mit einem chiral verdrehten Massenterm. Die folgenden Kap

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22

Renner, Dru Bryant 1977. "Exploring proton structure using lattice QCD." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29448.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2004.<br>Includes bibliographical references (leaves 219-222).<br>We calculate moments of the generalized parton distributions of the nucleon using lattice QCD. The generalized parton distributions determine the angular momentum decomposition of the nucleon and the transverse distributions of partons within the nucleon. Additionally, the generalized parton distributions reduce to the elastic form factors and ordinary parton distributions in particular kinematic limits. Thus by calculating moments of the generalized parto

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23

Janowski, Tadeusz. "Hadronic kaon decays from lattice QCD." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/386224/.

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24

Nakano, Takashi. "Strong-coupling Analysis of Lattice QCD." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/175119.

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25

Garden, Joyce. "Light hadron spectroscopy in lattice QCD." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/14886.

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This thesis presents the results of a numerical calculation of the light hadron spectrum in the lattice formulation of Quantum Chromodynamics. Results were obtained in both the quenched approximation, where the effects of quark loops in the QCD vacuum were neglected, and in "full" QCD, where two degenerate flavours of dynamical fermions were included in the simulation. All numerical simulations employed the standard Wilson gauge action with an <i>O</i>(a) improved Wilson fermion action. This study confirms that the quenched light hadron mass spectrum agrees with experiment at the 10% level. Fi

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26

Sternbeck, André. "The infrared behavior of lattice QCD green's functions a numerical study of lattice QCD in Landau gauge /." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981291910.

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27

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

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

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28

Ivanenko, Taras. "Study of instanton physics in lattice QCD." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/28176.

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29

Lepzelter, David 1981. "Use of correlation matrices in lattice QCD." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32742.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2004.<br>Includes bibliographical references (p. 117).<br>This thesis explores the use of correlation matrices in analyzing Monte Carlo calculations from lattice quantum chromodynamics. Correlation matrices are a powerful tool for examining many problems in which significant correlations exist, and thus offer potential advantages for lattice QCD. Several models were used to study the relative advantages of correlated and uncorrelated analyses. However, when applied to actual lattice data at current statistics, the method a

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30

Rios, Tascon Andres. "Exploration of new methods for Lattice QCD." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111884.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 59-60).<br>We explore two methods aimed at alleviating two difficulties in Lattice QCD: statistical noise and data storage. The first method intends to improve the signal-to-noise (S/N) ratio in three-point correlators, by extending previous work by Detmold and Endres. We test the method in the measurement of two observables: the nucleonic axial charge, and a matrix element computation related to the electromagnetic form factor

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31

Bailas, Gabriela. "Aspects of charmonium physics in Lattice QCD." Thesis, Université Clermont Auvergne‎ (2017-2020), 2018. http://www.theses.fr/2018CLFAC025/document.

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Les états de charmonium fournissent une source de connaissances pertinente pour déterminer les paramètres fondamentaux du Modèle Standard. Un aspect important de la compréhension et des tests de la QCD est de faire des prédictions précises du spectre des hadrons et de les tester par rapport à des données expérimentales de haute qualité. Notre cadre théorique est Lattice QCD, qui est considéré comme le seul moyen connu de traiter le lagrangien QCD complet de manière non perturbative et bien adaptée au calcul numérique. En utilisant l'action Wilson-Clover avec N_f = 2 saveurs dynamiques, nous ét

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32

Joo, Balint. "Efficient Monte Carlo simulation of Lattice QCD." Thesis, University of Edinburgh, 1999. http://hdl.handle.net/1842/12319.

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This thesis is concerned with the efficient simulation of lattice QCD with dynamical fermions. We discuss two aspects of this theme, the tuning of existing algorithms and the investigation of novel algorithms. We begin with an introduction to lattice QCD and Monte Carlo Methods for its simulation. Particular emphasis is placed on the difficulties of the lattice formulation of fermion fields. We then continue with a description of the Hybrid Monte Carlo (HMC) algorithm, focusing on the conditions the algorithm must obey for correctness and on some of the numerical methods required for its imple

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33

Sroczynski, Zbigniew. "Taking lattice QCD beyond the quenched approximation." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/14472.

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This thesis is mainly concerned with the problem of generating gauge configurations for use in Monte-Carlo lattice QCD calculations that include the effects of dynamical fermions. Although algorithms to do this have been in existence for some time the computing power necessary for their application at a scale where physically relevant results can be obtained has only recently become available, so these large scale dynamical simulations are still a new feature of lattice QCD. The emphasis here is on the new experiences gained from the design, implementation and development of a particular dynam

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34

Mazur, Lukas [Verfasser]. "Topological Aspects in Lattice QCD / Lukas Mazur." Bielefeld : Universitätsbibliothek Bielefeld, 2021. http://d-nb.info/1240832443/34.

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35

Ichihara, Terukazu. "Fluctuations in QCD phase diagram in the strong coupling limit of lattice QCD." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215301.

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権利表示を行うこと, 出典表示を行うこと, 出版社版へのリンクを表示すること<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(理学)<br>甲第19488号<br>理博第4148号<br>新制||理||1596(附属図書館)<br>32524<br>京都大学大学院理学研究科物理学・宇宙物理学専攻<br>(主査)教授大西明, 准教授菅沼秀夫, 教授田中貴浩<br>学位規則第4条第1項該当

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36

Schulze, Robert. "From hot lattice QCD to cold quark stars." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-65426.

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A thermodynamic model of the quark-gluon plasma using quasiparticle degrees of freedom based on the hard thermal loop self-energies is introduced. It provides a connection between an established phenomenological quasiparticle model – following from the former using a series of approximations – and QCD – from which the former is derived using the Cornwall-Jackiw-Tomboulis formalism and a special parametrization of the running coupling. Both models allow for an extrapolation of first-principle QCD results available at small chemical potentials using Monte-Carlo methods on the lattice to large ne

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37

Jäger, Benjamin [Verfasser]. "Hadronic matrix elements in lattice QCD / Benjamin Jäger." Mainz : Universitätsbibliothek Mainz, 2014. http://d-nb.info/1051121140/34.

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38

Thaler, Michael. "Phases of QCD lattice thermodynamics and quasiparticle approaches /." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=978932617.

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39

Kahl, Karsten. "Adaptive Algebraic Multigrid Methods for Lattice QCD Computations." Wuppertal Universitätsbibliothek Wuppertal, 2010. http://d-nb.info/1000531767/34.

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40

Ehmann, Christian. "A lattice QCD calculation of the charmonium spectrum." Regensburg Univ.-Verl. Regensburg, 2010. http://d-nb.info/1003055079/04.

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41

Van, de Water Ruth S. "Applications of chiral perturbation theory to lattice QCD /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/9730.

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42

Stewart, Chris. "Strings, quarkonium and nuclear physics in lattice QCD." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ56269.pdf.

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43

Engelson, Eric. "Excited nucleon and delta spectra from lattice QCD." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9564.

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Thesis (Ph.D.) -- University of Maryland, College Park, 2009.<br>Thesis research directed by: Dept. of Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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44

Allison, Ian. "Dynamical lattice QCD determinations for heavy quark physics." Thesis, University of Glasgow, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425153.

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45

Lesk, Victor Isaac. "Heavy-light hadron matrix elements from lattice QCD." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323943.

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46

Gough, Bran James. "Calculation of rare B decays in lattice QCD." Thesis, University of Southampton, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241262.

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47

Brantley, David. "Applications of Lattice Qcd to Hadronic Cp Violation." W&M ScholarWorks, 2018. https://scholarworks.wm.edu/etd/1550153870.

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Experimental tests of the Standard Model are reaching a precision in which they are probing beyond Standard Model parameter spaces. Increasingly precise experimental tests of the Standard Model (SM) require a concurrent theoretical push to provide ever more precise predictions to interpret experimental results. For example, future direct dark matter detection experiments, searches for Majorana neutrinos, and neutron electric dipole moment searches, all require a fundamental understanding of nuclear physics in the low-energy regime. Nuclear physics emerges from non-perturbative dynamics of the

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48

Sternbeck, André. "The infrared behavior of lattice QCD green's functions." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2006. http://dx.doi.org/10.18452/15527.

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Diese Arbeit untersucht im Rahmen der Gittereichtheorie verschiedene Aspekte der QCD in der Landau-Eichung, insbesondere solche, die mit den Gluon- und Geist-Propagatoren bei kleinen Impulsen zusammenhängen. Die Eichgruppe ist SU(3). Wir analysieren den Einfluss unterschiedlicher systematischer Effekte. Wir zeigen, dass der Formfaktor des Geist-Propagators bei kleinen Impulsen systematisch von der Wahl der Eichkopien (Gribov-Kopien) abhängt. Hingegen können wir einen solchen Einfluss auf den Gluon-Propagator nicht feststellen. Ebenfalls wird die Verteilung der kleinsten Eigenwerte

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49

Guazzini, Damiano. "Heavy-light mesons in lattice HQET and QCD." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2007. http://dx.doi.org/10.18452/15713.

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Wir stellen eine Untersuchung einer Kombination zwischen HQET und relativistischer QCD vor, die das Ziel hat, die b-Quark Masse und die Zerfallskonstante des Bs-Mesons aus Gitter-Simulationen, unter Nichtbeachtung virtueller Fermionenschleifen, zu gewinnen. Wir beginnen mit einem kleinen Volumen, in dem man das b-Quark direkt simulieren kann, und stellen die numerische Verbindung mit einem großen Volumen, wo ``finite-size'''' Effekte vernachlässigbar sind, mit Hilfe einer ``finite-size'''' Methode her. Diese besteht aus zum Kontinuum extrapolierten Schritten, wo

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50

Cheung, Gavin. "Spectroscopy of exotic charm mesons from lattice QCD." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/285556.

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Exotic mesons are mesons that cannot be described as a quark-antiquark pair. The number of exotic mesons has been growing every year in the charm sector and the theoretical understanding of them is often conflicted amongst the community. Some possible explanations include hybrid mesons where the quark-antiquark pair is coupled to a gluonic excitation, compact tetraquarks where four quarks are bound into a localised state and molecules which consist of pairs of extended mesons. To study exotic mesons from first principles, lattice QCD provides the framework to perform spectroscopy calculations

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