Journal article

Publication year: 1995

Pages: 35-40

Journal: Physics Letters B

Volume number: 363

Issue number: 1-2

ISSN: 0370-2693

Open access status: Green

DOI Link: https://doi.org/10.1016/0370-2693(95)01214-B

Publisher: Elsevier

Abstract: 
We present a dynamical study of e(+)e(-) production in proton-nucleus and nucleus-nucleus collisions at SPS energies on the basis of a covariant transport approach. For p + A reactions the dilepton yield for invariant masses m less than or equal to 1.2 GeV is found to be dominated by the decays of the eta,rho,omega and Phi mesons in line with the findings of the CERES Collaboration. For S + Au collisions at 200 GeV/A the dilepton yield is, however, dominated by pi(+)pi(-) annihilation due to the high pion densities achieved. For 'free' meson masses and form factors the experimental cross section is slightly underestimated for 0.3 GeV less than or equal to m less than or equal to 0.45 GeV. Effects due to different medium modifications of the rho-meson are studied in comparison to the CERES data.

Harvard Citation style: CASSING, W., EHEHALT, W. and KO, C. (1995) DILEPTON PRODUCTION AT SPS ENERGIES, Physics Letters B, 363(1-2), pp. 35-40. https://doi.org/10.1016/0370-2693(95)01214-B

APA Citation style: CASSING, W., EHEHALT, W., & KO, C. (1995). DILEPTON PRODUCTION AT SPS ENERGIES. Physics Letters B. 363(1-2), 35-40. https://doi.org/10.1016/0370-2693(95)01214-B