Dilepton production from resonance scattering in hot hadronic matter

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.53.2371· OSTI ID:283975

Song, C; Ko, C M ^[1]

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1. Cyclotron Institute and Physics Department, Texas A&M University, College Station, Texas 77843 (United States)

Dilepton production from resonance scattering in hot hadronic matter is studied. Including the widths of these resonances, which enhance the phase space for dilepton production, we find that the production rate is significantly increased if a resonance appears in the extended phase space. For the reaction {pi}+{rho}{r_arrow}{ital l}{sup +}+{ital l}{sup {minus}}, the finite {rho} meson width extends the invariant mass below the {omega}-meson mass, so a peak at the {omega}-meson mass is seen in the dilepton spectrum. Similarly, a {rho}-meson peak appears in the reaction {rho}+{rho}{r_arrow}{ital l}{sup +}+{ital l}{sup {minus}}. On the other hand, the effect of particle widths in the reaction {pi}+{ital a}{sub 1}{r_arrow}{ital l}{sup +}+{ital l}{sup {minus}} is small since the extended phase space does not include any resonance. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 283975
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 53; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
LEPTONS
MASS
OMEGA PARTICLES
PAIR PRODUCTION
PHASE SPACE
RESONANCE SCATTERING
WIDTH