منابع مشابه
Magnetic Screening at Finite Temperature
It is shown that at finite temperature and in the presence of magnetic sources magnetic fields are screened. This is proven within the framework of classical transport theory both for the Abelian and non-Abelian plasmas. Magnetic screening arises in this formalism as a consequence of polarization effects occurring in the plasmas, and it is non-perturbative in the gauge coupling constant. It is ...
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We present an alternative way to calculate the screening of the static potential between two charges in (non)abelian gauge theories at high temperatures. Instead of a loop expansion of a gauge boson self-energy, we evaluate the energy shift of the vacuum to order e 2 after applying an external static magnetic field and extract a temperature-and momentum-dependent dielectric permittivity. The Ha...
متن کاملScreening at finite temperature and density
We present lattice QCD results on heavy quark free energies, extract from its temperature dependence entropy and internal energy contributions, and discuss the onset of medium effects that lead to screening of static quark-antiquark sources in a thermal medium. Most results are obtained in (2+1)-flavour QCD on a line of constant physics with almost realistic quark masses and compared to previou...
متن کاملMesonic screening masses at high temperature and finite density
We compute the first perturbative correction to the static correlation lengths of light quark bilinears in hot QCD with finite quark chemical potentials. The correction is small and positive, with μ-dependence depending on the relative sign of chemical potentials and the number of dynamical flavors. The computation is carried out using a three-dimensional effective theory for the lowest fermion...
متن کاملContrasting real-time dynamics with screening phenomena at finite temperature.
We discuss the interpretation of Euclidean correlation functions at finite temperature (T ) and their relationship with the corresponding real-time Green’s functions. The soluble 2+1 dimensional Gross-Neveu model in the large-N limit is used throughout as a working example. First, the real-time bound state, identified as an elementary excitation at finite T , is solved. The bound state mass, th...
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ژورنال
عنوان ژورنال: Annals of Physics
سال: 1998
ISSN: 0003-4916
DOI: 10.1006/aphy.1997.5763