Excess electron pairs from heavy-ion collisions at CERN and more complete picture of thermal production
Journal Article
·
· Bulletin of the American Physical Society
OSTI ID:255485
The low mass dielectron signal from heavy-ion collisions at the CERN-SPS reported by the CERES collaboration is in excess of estimated contributions from hadronic decays and has been suggested as coming simply from two-pion annihilation. Yet the largest discrepancy between observation and estimated decay occurs in mass where the annihilation is not expected to be strong. However, Compton-like scattering ({pi}p {r_arrow}{pi}e{sup +}e{sup -}) provides favorable kinematics to enhance theoretical prediction for masses between 2m{sub {pi}} and m{sub {rho}}. Choosing conditions reasonable for a fire cylinder produced in central collisions at SPS energies, the resulting mass distribution is consistent with the one observed from S+Au reactions at 200 GeV/u.
- OSTI ID:
- 255485
- Report Number(s):
- CONF-9510116--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 10 Vol. 40; ISSN BAPSA6; ISSN 0003-0503
- Country of Publication:
- United States
- Language:
- English
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