Critical behaviour in QCD at finite isovector chemical potential

Details Critical behaviour in QCD at finite isovector chemical potential Critical behaviour in QCD at finite isovector chemical potential

2002-02-05

arxiv.org/abs/hep-lat/0202005v1

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages, 3 figures

Scientific paper

We report an investigation of criticality in QCD at finite isovector chemical potential, mu_3, and at zero temperature. At the critical point, mu_3^c = m_pi, we find that an uncharged scalar and pseudoscalar and a charged pseudoscalar meson become massless within the resolution of our measurement. The effective long distance theory therefore breaks O(4) symmetry by charged pion condensation. This results in a rising quark number susceptibility. The baryon remains massive, as indicated by a vanishing baryon number susceptibility.

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