Behavior of Hadrons at Finite Density -- Lattice Study of Color SU(2) QCD

Details Behavior of Hadrons at Finite Density -- Lattice Study of Color SU(2) QCD Behavior of Hadrons at Finite Density -- Lattice Study of Color SU(2) QCD

2002-11-05

arxiv.org/abs/hep-lat/0211010v2

Phys.Lett. B551 (2003) 305-310

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages, 9 figures. References updated. To appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(02)03065-4

Using two-color lattice QCD with Wilson fermions, we report a study of the finite baryon number density system with two-flavors. First we investigate the Polyakov line and thermodynamical uantities in the $(\kappa,\mu)$ plane, where $\kappa$ and $\mu$ are the hopping parameter and chemical potential in the fermion action, respectively. Then we calculate propagators of meson ($\bar{q}\Gamma q$) and baryon ($q\Gamma q$) states. We find that the vector meson propagators are strongly modified in large $\mu$ regions, indicating the reduction of the mass. This anomalous behavior of the vector meson is observed for the first time in lattice QCD.

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