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- W1175952928 abstract "Quantum chromodynamics (QCD) is the theory describing interaction between quarks and gluons. At low temperatures, quarks are confined forming hadrons, e.g. protons and neutrons. However, at extremely high temperatures the hadrons break apart and the matter transforms into plasma of individual quarks and gluons. In this theses the quark gluon plasma (QGP) phase of QCD is studied using lattice techniques in the framework of dimensionally reduced effective theories EQCD and MQCD. Two quantities are in particular interest: the pressure (or grand potential) and the quark number susceptibility. At high temperatures the pressure admits a generalised coupling constant expansion, where some coefficients are non-perturbative. We determine the first such contribution of order g6 by performing lattice simulations in MQCD. This requires high precision lattice calculations, which we perform with different number of colors Nc to obtain Nc-dependence on the coefficient. The quark number susceptibility is studied by performing lattice simulations in EQCD. We measure both flavor singlet (diagonal) and non-singlet (off-diagonal) quark number susceptibilities. The finite chemical potential results are optained using analytic continuation. The diagonal susceptibility approaches the perturbative result above 20Tc, but below that temperature we observe significant deviations. The results agree well with 4d lattice data down to temperatures 2Tc." @default.
- W1175952928 created "2016-06-24" @default.
- W1175952928 creator A5031962596 @default.
- W1175952928 date "2008-04-25" @default.
- W1175952928 modified "2023-09-23" @default.
- W1175952928 title "Simulations of dimensionally reduced effective theories of high temperature QCD" @default.
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