English

Vacuum phase transition at nonzero baryon density

High Energy Physics - Phenomenology 2008-11-26 v2

Abstract

It is argued that the dominant contribution to the interaction of quark gluon plasma at moderate TTcT\geq T_c is given by the nonperturbative vacuum field correlators. Basing on that nonperturbative equation of state of quark-gluon plasma is computed and in the lowest approximation expressed in terms of absolute values of Polyakov lines for quarks and gluons Lfund(T);Ladj(T)=(Lfund)9/4L_{fund} (T); L_{adj}(T)=(L_{fund})^{9/4}known from lattice and analytic calculations. Phase transition at any μ\mu is described as a transition due to vanishing of one of correlators, DE(x) D^E(x), which implies the change of gluonic condensate ΔG2\Delta G_2. Resulting transition temperature Tc(μ)T_c(\mu) is calculated in terms of Δ\DeltaG2G_2 and Lfund(Tc)L_{fund}(T_c). The phase curve Tc(μ)T_c(\mu) is in good agreement with lattice data. In particular Tc(0)=0.27;0.19;0.17T_c(0)=0.27; 0.19; 0.17 GeV for nf=0,2,3n_f=0,2,3 and fixed ΔG2=0.0035\Delta G_2=0.0035 GeV4^4.

Keywords

Cite

@article{arxiv.hep-ph/0703277,
  title  = {Vacuum phase transition at nonzero baryon density},
  author = {Yu. A. Simonov and M. A. Trusov},
  journal= {arXiv preprint arXiv:hep-ph/0703277},
  year   = {2008}
}

Comments

14 pages, 2 figures, 1 table; some abbreviations explained; to appear in Physics Letters B