Off-shell effects in dilepton production from hot interacting mesons

Abstract

The production of dielectrons in reactions involving a_1 mesons and pions is studied. We compare results obtained with different phenomenological Lagrangians that have been used in connection with hadronic matter and finite nuclei. We insist on the necessity for those interactions to satisfy known empirical properties of the strong interaction. Large off-shell effects in dielectron production are found and some consequences for the interpretation of heavy ion data are outlined. We also compare with results obtained using experimentally-extracted spectral functions.

14 pages, LaTeX2e, 2 figures

References in corpus (1)

• Rho Meson Propagation and Dilepton Enhancement in Hot Hadronic Matter

Cited by in corpus (15)

• Hadronic Production of Thermal Photons
• Hydrodynamic Models for Heavy Ion Collisions
• A Pure-Glue Hidden Valley I. States and Decays
• Rho properties in a hot meson gas
• Intermediate-mass dilepton spectra and the role of secondary hadronic processes in heavy-ion collisions
• Intermediate-mass dilepton production in heavy-ion collisions at 200A GeV
• Production of intermediate-mass dileptons in relativistic heavy ion collisions
• Electron-positron annihilation into four charged pions and the a_1-rho-pi Lagrangian
• Isospin Fluctuations in QCD and Relativistic Heavy-Ion Collisions
• Thermal photons and dileptons
• Joint description of the e+e- annihilation into both four-pion channels
• In-medium effects on electromagnetic probes
• $\rho$ meson broadening and dilepton production in heavy ion collisions
• Intermediate mass dileptons in relativistic nuclear collisions
• Hadronic and radiative decays of the tau lepton