Magnetic aspects of QCD at finite density and temperature

Details Magnetic aspects of QCD at finite density and temperature Magnetic aspects of QCD at finite density and temperature

2010-08-23

arxiv.org/abs/1008.3753v1

J.Phys.Conf.Ser.312:012014,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 8 figures, Proc. of INPN2010 to appear in J. Phys

Scientific paper

10.1088/1742-6596/312/1/012014

Some magnetic aspects of QCD are discussed at finite density and temperature. Possibility of spontaneous magnetization is studied within Landau Fermi-liquid theory, and the important roles of the screening effects for gluon propagation are elucidated. Static screening for the longitudinal gluons improves the infrared singularities, while the transverse gluons receive only dynamic screening. The latter property gives rise to a novel non-Fermi-liquid behaviour for the magnetic susceptibility. Appearance of a density-wave state is also discussed in relation to chiral transition, where pseudoscalar condensate as well as scalar one takes a spatially non-uniform form in a chirally invariant way. Accordingly magnetization of quark matter oscillates like spin density wave. A hadron-quark continuity is suggested in this aspect, remembering pion condensation in hadronic phase.

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