Equation of state for QCD at finite temperature and density. Resummation versus lattice data

Journal Article · Fri Jan 22 00:00:00 EST 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4938592· OSTI ID:22499010

Andersen, Jens O. ^[1]; Haque, Najmul; Mustafa, Munshi G. ^[2]; Strickland, Michael ^[3]; Su, Nan ^[4]

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1. Department of Physics, Norwegian University of Science and Technology, N-7491 Trondheim (Norway)
2. Theory Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata-700064 (India)
3. Department of Physics, Kent State University, Kent, Ohio 44242 (United States)
4. Fakultät für Physik, Universität Bielefeld, 33615 Bielefeld (Germany)

The perturbative series for finite-temperature field theories has very poor convergence properties and one needs a way to reorganize it. In this talk, I review two ways of reorganizing the perturbative series for field theories at finite temperature and chemical potential, namely hard-thermal-loop perturbation theory (HTLpt) and dimensional reduction (DR). I will present results for the pressure, trace anomaly, speed of sound, and the quark susceptibilities from a 3-loop HTLpt calculation and for the quark susceptibilities using DR at four loops. A careful comparison with available lattice data shows good agreement for a number of physical quantities.

• OSTI ID: 22499010
• Journal Information: AIP Conference Proceedings, Vol. 1701, Issue 1; Conference: 11. conference on quark confinement and hadron spectrum, Saint Petersburg (Russian Federation), 8-12 Sep 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPARATIVE EVALUATIONS
CONVERGENCE
DENSITY
EQUATIONS OF STATE
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
QUARKS
SOUND WAVES
VELOCITY