Two-Flavor Chiral Phase Transition in Lattice QCD with the Kogut-Susskind Quark Action

JLQCD Collaboration; S. Aoki; M. Fukugita; S. Hashimoto; N. Ishizuka; Y. Iwasaki; K. Kanaya; Y. Kuramashi; H. Mino; M. Okawa; A. Ukawa; T. YoshiÃ©

doi:10.1016/S0920-5632(97)00783-4

paper

Two-Flavor Chiral Phase Transition in Lattice QCD with the Kogut-Susskind Quark Action

arXiv:hep-lat/9710045 · doi:10.1016/S0920-5632(97)00783-4

Abstract

A summary is presented of a scaling study of the finite-temperature chiral phase transition of two-flavor QCD with the Kogut-Susskind quark action based on simulations on $L^{3} \times 4$ ( $L$ =8, 12 and 16) lattices at the quark mass of $m_{q} = 0.075, 0.0375, 0.02$ and 0.01. We find a phase transition to be absent for $m_{q} \geq 0.02$ , and also quite likely at $m_{q} = 0.01$ . The quark mass dependence of susceptibilities is consistent with a second-order transition at $m_{q} = 0$ . The exponents, however, deviate from the O(2) and O(4) values theoretically expected.

3 pages, Latex(espcrc2,epsf), 3 ps figures, Poster presented at Lattice 97