Photon emission from hot hadronic matter described by an effective chiral Lagrangian

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.2861· OSTI ID:6498606

Song, C ^[1]

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1. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

The emission rates for photons from hadronic matter are calculated for the elementary processes [pi][rho][r arrow][pi][gamma], [pi][pi][r arrow][rho][gamma], and [rho][r arrow][pi][pi][gamma] at [ital T]=100, 150, 200 MeV. Hadronic matter is described by an effective chiral Lagrangian with pions, [rho] mesons, and [ital A][sub 1] mesons. The vector and axial-vector mesons are included as massive Yang-Mills fields of chiral U([ital N][sub [ital f]])[sub [ital L]][times]U([ital N][sub [ital f]])[sub [ital R]] symmetry. The emission rates are compared with those obtained without the [ital A][sub 1] meson. For [pi][rho][r arrow][pi][gamma] and [pi][pi][r arrow][rho][gamma] reactions the photon emission rates are increased with the inclusion of the [ital A][sub 1] meson in intermediate states. There is a small increase of the emission rate from [rho]-meson decay.

• DOE Contract Number: FG02-87ER40328
• OSTI ID: 6498606
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:6; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

662230* -- Quantum Chromodynamics-- (1992-)
663460 -- Meson- & Hyperon-induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSONS
CHARGED-PARTICLE REACTIONS
CHIRAL SYMMETRY
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
GAMMA SPECTRA
HADRON REACTIONS
HADRONS
HEAVY ION REACTIONS
MATTER
MESONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR MATTER
NUCLEAR REACTIONS
PIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MATTER
SPECTRA
SYMMETRY
YANG-MILLS THEORY