Scaling behavior at the N{sub t}=6 chiral phase transition for 2-flavor lattice QCD with massless staggered quarks, and an irrelevant 4-fermion interaction

Journal Article · Wed Aug 01 04:00:00 EDT 2001 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.64.034508· OSTI ID:40277080

Kogut, J B; Sinclair, D K

We have simulated lattice QCD with 2 flavors of massless staggered quarks. An irrelevant chiral 4-fermion interaction was added to the standard quark action to allow us to simulate at zero quark mass. Thermodynamics was studied on lattices of temporal extent 6. Clear evidence for a second order chiral transition was observed and the critical exponents {beta}{sub mag}, {delta}, {nu} and {gamma}{sub mag} were measured. These exponents do not agree with those expected by standard universality arguments. They are, however, consistent with tricritical behavior. The {pi} and {sigma} screening masses were measured and show clear evidence for chiral symmetry restoration at this transition.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• Sponsoring Organization: (US)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 40277080
• Journal Information: Physical Review D, Journal Name: Physical Review D Journal Issue: 3 Vol. 64; ISSN 0556-2821
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
ENANTIOMORPHS
QUANTUM CHROMODYNAMICS
QUARKS
THERMODYNAMICS