2003/04/30 by Anton Rebhan, A. Rebhan, Paul Romatschke +1 · 7 citations
Physics and Astronomy · #Condensed matter physics #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Massless particle #Particle physics #Particle physics theoretical and experimental studies #Physics #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Quark #Quasiparticle #Thermal #Thermodynamic potential #Thermodynamics #hep-ph
paper · pdf · doi:10.1103/physrevd.68.025022
published as Phys.Rev. D68 (2003) 025022 · 11 pages, 9 figures, RevTeX4; v2: references and 3 plots updated
arxiv created 2003/05/09 · openalex publication_date 2003/07/30 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using quasiparticle models and imposing thermodynamic consistency, lattice data for the equation of state of deconfined QCD can be mapped to finite chemical potential. We consider a refinement of existing simple massive quasiparticle models using the nonlocal hard-thermal-loop propagators, and certain next-to-leading-order corrections thereof, to obtain the thermodynamic potential as a function of temperature and chemical potential. At small chemical potential we find that the results for the slope of constant pressure from our main model for two massless quark flavors is in good agreement with recent lattice data for 2+1 flavors while it deviates somewhat from lattice data for two flavors from another group. For zero temperature, we obtain an estimate for the critical chemical potential which is close to that obtained from simpler quasiparticle models.