2014/11/05 by Jens O. Andersen, Najmul Haque, Munshi G. Mustafa +2 · 3 citations
Physics and Astronomy · #Convergent series #High-Energy Particle Collisions Research #Lattice (music) #Neumann series #Perturbation theory (quantum mechanics) #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Resummation #Series (stratigraphy) #hep-ph
paper · pdf · doi:10.1063/1.4938592
published in AIP conference proceedings 1701, 020003 (American Institute of Physics) · Invited talk at 1th Quark Confinement and the Hadron Spectrum, September 8-12 2014, Saint Petersburg, Russia. 12 pages. 18 figs
arxiv created 2014/11/05 · openalex publication_date 2016/01/01 · arxiv updated 2016/01/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.