Thermodynamics of latticd QCD with chiral 4-fermion interactions.
We have studied lattice QCD with an additional, irrelevant 4-fermion interaction having a U(1)xU(1) chiral symmetry, at finite temperatures. Adding this 4-fermion term allowed us to work at zero quark mass, which would have otherwise been impossible. The theory with 2 massless staggered quark flavors appears to have a first order finite temperature phase transition at N{sub t}=4 for the value of 4-fermion coupling we have chosen, in contrast to what is expected for 2-flavor QCD. The pion screening mass is seen to vanish below this transition, only to become massive and degenerate with the {sigma} (f{sub 0}) above this transition where the chiral symmetry is restored, as is seen by the vanishing of the chiral condensate.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- ER
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 938278
- Report Number(s):
- ANL-HEP-PR-97-28
- Journal Information:
- Phys. Rev. D, Journal Name: Phys. Rev. D Journal Issue: 3 ; Aug. 1, 1998 Vol. 58; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- ENGLISH
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