2002/09/05 by The MILC Collaboration, C. Bérnard, C. Bernard +13 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #High-Energy Particle Collisions Research #High-pressure geophysics and materials #Quantum Chromodynamics and Particle Interactions #hep-lat
paper · pdf · doi:10.1016/s0920-5632(03)01603-7
published as Nucl.Phys.Proc.Suppl.119:523-528,2003 · Lattice2002(Non-zero temperature and density)
arxiv created 2002/09/05 · openalex publication_date 2003/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present an update of our study of high temperature QCD with three flavors of quarks, using a Symanzik improved gauge action and the Asqtad staggered quark action. Simulations are being carried out on lattices with Nt=4, 6 and 8 for the case of three degenerate quarks with masses less than or equal to the strange quark mass, ms, and on lattices with Nt=6 and 8 for degenerate up and down quarks with masses in the range 0.2 ms ≤ mu,d ≤ 0.6 ms, and the strange quark fixed near its physical value. We also report on first computations of quark number susceptibilities with the Asqtad action. These susceptibilities are of interest because they can be related to event-by-event fluctuations in heavy ion collision experiments. Use of the improved quark action leads to a substantial reduction in lattice artifacts. This can be seen already for free fermions and carries over into our results for QCD.