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つくばリポジトリ (Tulips-R) >
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Physical review D >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/2241/89393
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| Title: | Scaling study of the two-flavor chiral phase transition with the Kogut-Susskind quark action in lattice QCD |
| Authors: | Aoki, S.
Fukugita, M.
Hashimoto, S.
Ishizuka, N.
Iwasaki, Y.
Kanaya, K.
Kuramashi, Y.
Mino, H.
Okawa, M.
Ukawa, A.
Yoshié, T.
岩崎, 洋一
宇川, 彰 |
| Issue Date: | Apr-1998 |
| Publisher: | American Physical Society |
| Journal Title: | Physical review D |
| Volume: | 57 |
| Issue: | 7 |
| Start Page: | 3910 |
| End Page: | 3922 |
| DOI: | 10.1103/PhysRevD.57.3910 |
| Abstract: | We report on a study of the two-flavor finite-temperature chiral phase transition employing the Kogut-Susskind quark action and the plaquette gluon action in lattice QCD for a lattice with Nt=4 temporal size. Hybrid R simulations of 104 trajectories are made at quark masses of mq=0.075,0.0375,0.02,0.01 in lattice units for the spatial sizes 83,123, and 163. The spatial size dependence of various susceptibilities confirm the previous conclusion of the absence of a phase transition down to mq=0.02. At mq=0.01 an increase of susceptibilities is observed up to the largest volume 163 explored in the present work. We argue, however, that this increase is likely to be due to an artifact of too small a lattice size and it cannot be taken to be the evidence for a first-order transition. Analysis of critical exponents estimated from the quark mass dependence of susceptibilities shows that they satisfy hyperscaling consistent with a second-order transition located at mq=0. The exponents obtained from larger lattice, however, deviate significantly from both those of O(2), which is the exact symmetry group of the Kogut-Susskind action at finite lattice spacing, and those of O(4) expected from an effective σ model analysis in the continuum limit. |
| URI: | http://hdl.handle.net/2241/89393 |
| Rights: | ©1998 The American Physical Society |
| Text Version: | publisher |
| Appears in Collections: | 岩崎 洋一 (Iwasaki Yoichi)
Physical review D
宇川 彰 (Ukawa Akira)
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