The Critical Points of Strongly Coupled Lattice QCD at Nonzero Chemical Potential

Details The Critical Points of Strongly Coupled Lattice QCD at Nonzero Chemical Potential The Critical Points of Strongly Coupled Lattice QCD at Nonzero Chemical Potential

1997-05-29

arxiv.org/abs/hep-lat/9705038v1

Phys.Rev. D56 (1997) 7063-7072

Physics

High Energy Physics

High Energy Physics - Lattice

36 pages, RevTeX, 13 eps figures

Scientific paper

10.1103/PhysRevD.56.7063

We study QCD at non-zero quark density, zero temperature, infinite coupling using the Glasgow algorithm. An improved complex zero analysis gives a critical point \mu_c in agreement with that of chiral symmetry restoration computed with strong coupling expansions, and monomer-dimer simulations. We observe, however, two unphysical critical points: the onset for the number density \mu_o, and \mu_s the saturation threshold, coincident with pathological onsets observed in past quenched QCD calculations. An analysis of the probability distributions for particle number supports our physical interpretation of the critical point \mu_c, and offers a new intepretation of \mu_o, which confirms its unphysical nature. The perspectives for future lattice QCD calculations of the properties of dense baryonic matter are briefly discussed.

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