Thermal dileptons from pi-p interactions in a hot pion gas

Baier R, Dirks M, Redlich K (1997)
PHYSICAL REVIEW D 55(7): 4344-4354.

Journal Article | Published | English

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Abstract
The production of low mass dileptons from pi-rho interactions in a hot medium is studied. Applying finite temperature perturbation theory the dilepton rate is computed up to order g(p)(2). For dilepton masses below the rho the two-body reactions pi pi-->rho gamma*, pi rho-->pi gamma*, and the decay process rho-->pi pi gamma* give significant contributions. Nonequilibrium contributions to the thermal rate are estimated, including the modification of the particle distribution function with a nonzero pion chemical potential. A comparison of the dilepton rate with the recent data measured in nucleus-nucleus collisions al CERN SPS energy by the CERES Collaboration is also performed. It is shown that the additional thermal dileptons from pi-rho interactions can partially account for the excess of the soft dilepton yield seen experimentally.
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Baier R, Dirks M, Redlich K. Thermal dileptons from pi-p interactions in a hot pion gas. PHYSICAL REVIEW D. 1997;55(7):4344-4354.
Baier, R., Dirks, M., & Redlich, K. (1997). Thermal dileptons from pi-p interactions in a hot pion gas. PHYSICAL REVIEW D, 55(7), 4344-4354.
Baier, R., Dirks, M., and Redlich, K. (1997). Thermal dileptons from pi-p interactions in a hot pion gas. PHYSICAL REVIEW D 55, 4344-4354.
Baier, R., Dirks, M., & Redlich, K., 1997. Thermal dileptons from pi-p interactions in a hot pion gas. PHYSICAL REVIEW D, 55(7), p 4344-4354.
R. Baier, M. Dirks, and K. Redlich, “Thermal dileptons from pi-p interactions in a hot pion gas”, PHYSICAL REVIEW D, vol. 55, 1997, pp. 4344-4354.
Baier, R., Dirks, M., Redlich, K.: Thermal dileptons from pi-p interactions in a hot pion gas. PHYSICAL REVIEW D. 55, 4344-4354 (1997).
Baier, Rudolf, Dirks, M, and Redlich, K. “Thermal dileptons from pi-p interactions in a hot pion gas”. PHYSICAL REVIEW D 55.7 (1997): 4344-4354.
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