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Title: S parameter at nonzero temperature and chemical potential

Abstract

We compute the finite-temperature and matter density corrections to the S-parameter at the one-loop level. At nonzero temperature T and matter density {mu} Lorentz symmetry breaks and therefore we suggest a suitable generalization of the S-parameter. By computing the plasma correction, we discover a reduction of the S-parameter in the physically relevant region of small external momenta for any nonzero {mu} and T. In particular, the S-parameter vanishes at small m/T, where m is the mass of the fermions, due to the finite extent of the temporal direction. Our results are directly applicable to the determination of the S-parameter via first-principle lattice simulations performed with antiperiodic boundary conditions in the temporal direction.

Authors:
; ;  [1]
  1. CP3-Origins and DIAS, Campusvej 55, DK-5230 Odense M (Denmark)
Publication Date:
OSTI Identifier:
21607825
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 84; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.84.075022; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BOUNDARY CONDITIONS; COMPUTERIZED SIMULATION; CORRECTIONS; DENSITY; FERMIONS; LATTICE FIELD THEORY; MASS; PLASMA; SYMMETRY; SYMMETRY BREAKING; CONSTRUCTIVE FIELD THEORY; FIELD THEORIES; PHYSICAL PROPERTIES; QUANTUM FIELD THEORY; SIMULATION

Citation Formats

Soendergaard, Ulrik Ishoej, Pica, Claudio, and Sannino, Francesco. S parameter at nonzero temperature and chemical potential. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.84.075022.
Soendergaard, Ulrik Ishoej, Pica, Claudio, & Sannino, Francesco. S parameter at nonzero temperature and chemical potential. United States. doi:10.1103/PHYSREVD.84.075022.
Soendergaard, Ulrik Ishoej, Pica, Claudio, and Sannino, Francesco. Sat . "S parameter at nonzero temperature and chemical potential". United States. doi:10.1103/PHYSREVD.84.075022.
@article{osti_21607825,
title = {S parameter at nonzero temperature and chemical potential},
author = {Soendergaard, Ulrik Ishoej and Pica, Claudio and Sannino, Francesco},
abstractNote = {We compute the finite-temperature and matter density corrections to the S-parameter at the one-loop level. At nonzero temperature T and matter density {mu} Lorentz symmetry breaks and therefore we suggest a suitable generalization of the S-parameter. By computing the plasma correction, we discover a reduction of the S-parameter in the physically relevant region of small external momenta for any nonzero {mu} and T. In particular, the S-parameter vanishes at small m/T, where m is the mass of the fermions, due to the finite extent of the temporal direction. Our results are directly applicable to the determination of the S-parameter via first-principle lattice simulations performed with antiperiodic boundary conditions in the temporal direction.},
doi = {10.1103/PHYSREVD.84.075022},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 84,
place = {United States},
year = {2011},
month = {10}
}