Spectral properties of quarks above Tc in quenched lattice QCD

2007/08/31 by Frithjof Karsch, Masakiyo Kitazawa · 32 citations
Physics and Astronomy · #Algorithm #Artificial intelligence #Computer science #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph

paper · pdf · open access · doi:10.1016/j.physletb.2007.10.034

published in Physics Letters B 658(1-3), 45-49 (Elsevier BV) · 5 pages, 3 figures, typos corrected, references added

openalex publication_date 2007/10/26 · arxiv created 2007/11/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We analyze the quark spectral function above the critical temperature for deconfinement in quenched lattice QCD using clover improved Wilson fermions in Landau gauge. We show that the temporal quark correlator is well reproduced by a two-pole approximation for the spectral function and analyze the bare quark mass dependence of both poles as well as their residues. In the chiral limit we find that the quark spectral function has two collective modes which correspond to the normal and plasmino excitations. At large values of the bare quark mass the spectral function is dominated by a single pole.

Citations

• Investigating and optimizing the chiral properties of lattice fermion actions
• A lattice calculation of thermal dilepton rates
• Fluctuations, strangeness, and quasiquarks in heavy-ion collisions from lattice QCD
• Neutrino collective excitations in the standard model at high temperature
• Experimental and theoretical challenges in the search for the quark–gluon plasma: The STAR Collaboration's critical assessment of the evidence from RHIC collisions