TY - JOUR
T1 - Thermal effects on dilepton production from π-π annihilation
AU - Song, Chungsik
AU - Koch, Volker
AU - Lee, Su Houng
AU - Ko, C. M.
PY - 1996/1/11
Y1 - 1996/1/11
N2 - We study finite temperature effects on dilepton production from pion-pion annihilation in hot hadronic matter. The softening of the pion dispersion relation in a medium is found to enhance the production rate of dileptons with invariant masses in the region of 2m*π(T) < M < mρ. On the other hand, the reduction of the pion electromagnetic form factor at finite temperature leads to a suppression of the dilepton production rate. Including both effects, we have found that the dilepton yield is slightly enhanced in the invariant mass region M = 270 ∼ 600 MeV but is suppressed around the vector meson resonance. We further discuss the relevance of our results to recent experimental data from the S+Au collisions at CERN/SPS energies by the CERES Collaboration.
AB - We study finite temperature effects on dilepton production from pion-pion annihilation in hot hadronic matter. The softening of the pion dispersion relation in a medium is found to enhance the production rate of dileptons with invariant masses in the region of 2m*π(T) < M < mρ. On the other hand, the reduction of the pion electromagnetic form factor at finite temperature leads to a suppression of the dilepton production rate. Including both effects, we have found that the dilepton yield is slightly enhanced in the invariant mass region M = 270 ∼ 600 MeV but is suppressed around the vector meson resonance. We further discuss the relevance of our results to recent experimental data from the S+Au collisions at CERN/SPS energies by the CERES Collaboration.
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U2 - 10.1016/0370-2693(95)01363-6
DO - 10.1016/0370-2693(95)01363-6
M3 - Article
AN - SCOPUS:22044451558
SN - 0370-2693
VL - 366
SP - 379
EP - 384
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-4
ER -