Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1993-11-26
Nucl.Phys.Proc.Suppl. 34 (1994) 314-316
Physics
High Energy Physics
High Energy Physics - Lattice
3 pages with 5 PS figures, LaTeX (espcrc2.sty required), UTHEP-266
Scientific paper
10.1016/0920-5632(94)90377-8
The phase structure of QCD with various number of flavors is studied for Wilson quarks. For the case of $N_F=3$ we find that the finite temperature deconfining transition is of first order in the chiral limit on an $N_t=4$ lattice. Together with our previous results that the deconfining transition in the chiral limit is continuous for $N_F=2$ and is first order for $N_F=6$, the order of the transition is found to be consistent with a prediction of universality. The case of $SU(2)$ QCD is also studied in the strong coupling limit and the phase structure is found to be quite similar to the case of $SU(3)$: There exists a critical number of flavors $N_F^*$ and for $N_F \geq N_F^*$ the confinement is broken even in the strong coupling limit for light quarks. $N_F^*=3$ corresponding to 7 for $SU(3)$.
Iwasaki Yoshihito
Kanaya Kazuyuki
Sakai Shoko
Yoshi'e T.
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