Three-pion reactions in dilepton production from a hadron gas

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.49.5812· OSTI ID:7050044

Lichard, P ^[1]

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1. Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455 (United States) Institute for Theoretical Physics, University of California, Santa Barbara, California 93106 (United States)

Kinetic theory formulae are derived for the dilepton production rate from processes of the type 1+2+3[r arrow][ital l][sup +][ital l][sup [minus]] and 1+2[r arrow]3+([ital l][sup +][ital l][sup [minus]]) in hadronic or partonic systems. The formalism is applied to three-pion reactions [pi][sup +][pi][sup [minus]][pi][sup 0][r arrow][mu][sup +][mu][sup [minus]], [pi][sup [plus minus]][pi][sup 0][r arrow][pi][sup [plus minus]][mu][sup +][mu][sup [minus]], and [pi][sup +][pi][sup [minus]][r arrow][pi][sup 0][mu][sup +][mu][sup [minus]] in a thermalized hadron gas. The dilepton mass spectra are compared to those from previously considered reactions at different temperatures. The three-pion processes amplify the [omega](783) and [phi](1020) peaks in the dilepton mass spectrum. The consequences for using resonance dileptons as a tool for measuring mean lifetime and temperature of hadronic fireballs are discussed.

• OSTI ID: 7050044
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 49:11; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662340 -- Hadron Interactions-- (1992-)
663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSONS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
FERMIONS
FIREBALLS
HADRON REACTIONS
HADRONS
INTERACTIONS
LEPTONS
LIFETIME
MASS SPECTRA
MESON REACTIONS
MESONS
NUCLEAR REACTIONS
OMEGA-783 MESONS
PAIR PRODUCTION
PARTICLE PRODUCTION
PHI-1020 MESONS
PION REACTIONS
QUARKONIUM
RESONANCE
SPECTRA
STRANGEONIUM
VECTOR MESONS