arXiv:hep-lat/9710045·v1·High Energy Physics — Lattice

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. Yoshié🇯🇵

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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.