Drag force on heavy quarks and spatial string tension
نویسندگان
چکیده
منابع مشابه
Comparing the drag force on heavy quarks in N = 4 super-Yang-Mills theory and QCD
Computations of the drag force on a heavy quark moving through a thermal state of strongly coupled N = 4 super-Yang-Mills theory have appeared recently [1, 2, 3]. I compare the strength of this effect between N = 4 gauge theory and QCD, using the static force between external quarks to normalize the ’t Hooft coupling. Comparing N = 4 and QCD at fixed energy density then leads to a relaxation ti...
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The spatial string tension, a classic non-perturbative probe for the convergence of the weak-coupling expansion at high temperatures, can be determined in full QCD as well as in a dimensionally reduced effective theory. Comparing both approaches, we find surprisingly good agreement almost down to the critical temperature of the deconfinement phase transition. c Copyright owned by the author(s) ...
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The generalization of the effective action [1] of the quark–antiquark system in the confining vacuum is performed for the case of arbitrary quark masses. The interaction of quarks is described by the averaged Wilson loop for which we use the minimal area law asymptotics. The system is quantized by the path integral method and the quantum Hamiltonian is obtained. It contains not only quark degre...
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Using the gauge-string duality, I compute two-point functions of the force acting on an external quark moving through a finite temperature bath of N = 4 super-Yang-Mills theory. I comment on the possible relevance of the string theory calculations to heavy quarks propagating through a quark-gluon plasma.
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Accurate studies of the production and decays of beauty and charm hadrons are exploiting a unique laboratory for testing the Standard Model in the fermion sector, for studying QCD in the non-perturbative regime and for searching for New Physics through virtual processes. The first two items are the main subjects of this paper while the latter is discussed in [ 1]. In the Standard Model, weak in...
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ژورنال
عنوان ژورنال: Modern Physics Letters A
سال: 2018
ISSN: 0217-7323,1793-6632
DOI: 10.1142/s0217732318500414