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

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 $(κ,μ)$ plane, where $κ$ and $μ$ are the hopping parameter and chemical potential in the fermion action, respectively. Then we calculate propagators of meson ($\bar{q}Γq$) and baryon ($qΓq$) states. We find that the vector meson propagators are strongly modified in large $μ$ regions, indicating the reduction of the mass. This anomalous behavior of the vector meson is observed for the first time in lattice QCD.

preprint2002arXivOpen access
Shin MuroyaAtsushi NakamuraChiho Nonaka
hep-lat
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Shin MuroyaAtsushi NakamuraChiho Nonaka

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