Role of nucleons in electromagnetic emission rates

Journal Article · Sun Aug 01 04:00:00 EDT 1999 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.60.037502· OSTI ID:355487

Steele, J V ^[1]; Zahed, I ^[2]

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1. Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)
2. Department of Physics and Astronomy, SUNY, Stony Brook, New York 11794 (United States)

Electromagnetic emission rates from a thermalized hadronic gas are important for the interpretation of dilepton signals from heavy-ion collisions. Although there is a consensus in the literature about rates for a pure meson gas, qualitative differences appear with a finite baryon density. We show this to be essentially due to the way in which the {pi}N background is treated in regards to the nucleon resonances. Using a background constrained by unitarity and broken chiral symmetry, it is emphasized that the thermalized hadronic gas can be considered dilute. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 355487
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 3 Vol. 60; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHIRAL SYMMETRY
ELECTROMAGNETIC INTERACTIONS
HEAVY ION REACTIONS
NUCLEONS
PIONS
QUANTUM CHROMODYNAMICS
QUARK MATTER
UNITARITY
UNITARY SYMMETRY