Role of baryons in chiral-symmetry restoration at high temperature

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.224· OSTI ID:6695006

DeTar, C ^[1]

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1. Department of Physics, University of Utah, Salt Lake City, Utah 84112 (USA)

To help provide insight into the apparent remarkable rise in baryon susceptibility at the high-temperature phase transition in QCD, we study the three-dimensional lattice SU(2) chiral model at finite temperature. The purpose of this study is to determine the extent to which a rising susceptibility is a natural consequence of chiral-symmetry restoration in a nonlinear {sigma} model. Indeed the susceptibility, defined in terms of a discrete (nonconserved) version of the winding number, is found to rise rapidly in the vicinity of the phase transition, suggesting that a proliferation of baryons and antibaryons (i.e., Skyrmions) plays a significant role in the restoration of the chiral symmetry. These results support the idea that the cooling of the quark plasma could result in copious antibaryon production.

• OSTI ID: 6695006
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:1; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIBARYONS
ANTIMATTER
ANTIPARTICLES
BARYONS
CHIRAL SYMMETRY
ELEMENTARY PARTICLES
FERMIONS
FEYNMAN PATH INTEGRAL
FIELD THEORIES
FUNCTIONS
HADRONS
INTEGRALS
LATTICE FIELD THEORY
LIE GROUPS
MATHEMATICAL MODELS
MATTER
PARTICLE MODELS
PARTITION FUNCTIONS
PHASE TRANSFORMATIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MATTER
SIGMA MODEL
SU GROUPS
SU-2 GROUPS
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
TEMPERATURE DEPENDENCE
THREE-DIMENSIONAL CALCULATIONS
U GROUPS
U-2 GROUPS