Spectral Properties of Quarks at Finite Temperature in Lattice QCD

Journal Article · Thu Sep 17 04:00:00 EDT 2009 · Nuclear Physics, A

OSTI ID:1040394

Karsch, F; Kitazawa, M

We analyze the quark spectral function above and below the critical temperature for deconfinement and at finite momentum in quenched lattice QCD. It is found that the temporal quark correlation function in the deconfined phase near the critical temperature is well reproduced by a two-pole ansatz for the spectral function. The bare quark mass and momentum dependences of the spectral function are analyzed with this ansatz. In the chiral limit we find that even near the critical temperature the quark spectral function has two collective modes corresponding to the normal and plasmino excitations in the high temperature (T) limit. The pole mass of these modes at zero momentum, which should be identified to be the thermal mass of the quark, is approximately proportional to T in a rather wide range of T in the deconfined phase.

• Research Organization: BROOKHAVEN NATIONAL LABORATORY (BNL)
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1040394
• Report Number(s): BNL--91274-2010-JA; KB0301020
• Journal Information: Nuclear Physics, A, Journal Name: Nuclear Physics, A Journal Issue: 1-4 Vol. 830; ISSN 0375-9474; ISSN NUPABL
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CORRELATION FUNCTIONS
CRITICAL TEMPERATURE
QCD
QUANTUM CHROMODYNAMICS
QUARKS
SPECTRAL FUNCTIONS
Spectral
THERMAL MASS
lattice
quarks