2001/05/31 by Jens O. Andersen, Jens. O Andersen, Michael Strickland
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #High-Energy Particle Collisions Research #hep-ph
paper · pdf · doi:10.1103/physrevd.64.105012
published as Phys.Rev. D64 (2001) 105012 · 22 pages, 10 figures
arxiv created 2001/08/08 · openalex publication_date 2001/10/19 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
The thermodynamics of massless \ensuremathφ4 theory is studied within screened perturbation theory (SPT). In this method the perturbative expansion is reorganized by adding and subtracting a mass term in the Lagrangian. We analytically calculate the pressure and entropy to three-loop order and the screening mass to two-loop order, expanding in powers of m/T. The truncated m/T expansion results are compared with numerical SPT results for the pressure, entropy and screening mass which are accurate to all orders in m/T. It is shown that the m/T expansion converges quickly and provides an accurate description of the thermodynamic functions for large values of the coupling constant.