Phys. Rev. C 71, 064903 (2005) [16 pages]Nonperturbative finite T broadening of the ρ meson and dilepton emission in heavy-ion collisionsSee Also: Erratum Received 13 December 2004; published 7 June 2005 We study self-consistently the finite T broadening of the ρ meson and its implications for dilepton emission in heavy-ion collisions. For this purpose finite width effects at finite temperature due to the ρ-π interaction are investigated in a self-consistent Φ-functional approach. The temperature dependence of the ρ meson and pion spectral functions and self-energies is discussed. The spectral functions show considerable broadening in comparison with a perturbative calculation on the one-loop level. Using these spectral functions, we make a comparison to dilepton emission data from the CERES NA49 Collaboration employing a parametrized fireball evolution model of collision. We demonstrate that these nonperturbative finite width effects are in-medium modifications relevant to the understanding of the enhancement of the low invariant mass spectrum of dileptons emitted in A-A collisions. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.71.064903
DOI:
10.1103/PhysRevC.71.064903
PACS:
21.65.+f, 12.40.Yx
See AlsoComment: Felix Riek, Hendrik van Hees, and Jörn Knoll, Comment on “Nonperturbative finite T broadening of the ρ meson and dilepton emission in heavy-ion collisions”, Phys. Rev. C 75, 059801 (2007). Erratum: Jörg Ruppert and Thorsten Renk, Erratum: Nonperturbative finite T broadening of the ρ meson and dilepton emission in heavy-ion collisions [Phys. Rev. C 71, 064903 (2005)], Phys. Rev. C 75, 059901 (2007). |
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.