Prompt contributions to the dilepton yield in heavy ion collisions
Abstract
The mass spectrum is calculated for those dileptons which are produced in the early phase of a heavy ion collisions via the direct production NN → l+l‑X and via the Compton process GN → l+l‑X with prompt gluons radiated in preceding NN interactions. Both mechanisms produce a mass spectrum which decreases steeply with invariant mass of the l+l‑ pair and which is below the CERES data for Pb-Au collisions by about one order of magnitude.
- Publication:
-
European Physical Journal A
- Pub Date:
- March 2000
- DOI:
- arXiv:
- arXiv:nucl-th/9911064
- Bibcode:
- 2000EPJA....7..391H
- Keywords:
-
- PACS: 13.85.Qk Inclusive production with identified leptons;
- photons;
- or other nonhadronic particles;
- 24.85.+p Quarks;
- gluons;
- and QCD in nuclei and nuclear processes;
- 12.38.Bx Perturbative calculations;
- 12.38.Lg Other nonperturbative calculations;
- or other nonhadronic particles – 24.85.+p Quarks;
- and QCD in nuclei and nuclear processes – 12.38.Bx Perturbative calculations – 12.38.Lg Other nonperturbative calculations;
- Nuclear Theory;
- High Energy Physics - Phenomenology
- E-Print:
- 10 pages, 4 figures, using epsfig, minor changes, results unchanged