Open charm contribution to dilepton spectra produced in nuclear collisions at SPS energies

Details Open charm contribution to dilepton spectra produced in nuclear collisions at SPS energies Open charm contribution to dilepton spectra produced in nuclear collisions at SPS energies

1997-04-30

arxiv.org/abs/nucl-ex/9704011v3

Eur.Phys.J.C1:123-130,1998

Physics

Nuclear Physics

Nuclear Experiment

19 pages, 12 eps figures included. To be published in Z.Phys. C

Scientific paper

Measurements of open charm hadro-production from CERN and Fermilab experiments are reviewed, with particular emphasis on the absolute cross sections and on their A and sqrt(s) dependences. Differential pt and xf cross sections calculated with the Pythia event generator are found to be in reasonable agreement with recent data. The calculations are scaled to nucleus-nucleus collisions and the expected lepton pair yield is deduced. The charm contribution to the low mass dilepton continuum observed by the CERES experiment is found to be negligible. In particular, it is shown that the observed low mass dilepton excess in S-Au collisions cannot be explained by charm enhancement.

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