Enhancement of intermediate mass dileptons from charm decays at SPS energies
نویسندگان
چکیده
منابع مشابه
Enhancement of Intermediate Mass Dileptons From Charm Decays At SPS Energies
We study the dimuon yield from open charm decays in the intermediate mass region(IMR) in heavy-ion collisions at the CERN-SPS energy. We find that final state rescatterings which broaden the mT spectrum of charmed mesons can enrich the part of the phase space covered by the NA50 experiment, thus leading to an apparent enhancement of IMR dileptons within the acceptance of the experiment. Such an...
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Abstract. Clear signs of excess dileptons above the known sources were found at the SPS since long. However, a real clarification of these observations was only recently achieved by NA60, measuring dimuons with unprecedented precision in 158A GeV In-In collisions. The excess mass spectrum in the region M<1 GeV is consistent with a dominant contribution from ππ → ρ → μμ annihilation. The associa...
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The significance of thermal dilepton radiation at intermediate invariant masses (1 GeV < M < 3 GeV) in ultrarelativistic heavy-ion collisions is investigated. At CERN-SpS energies, a consistent explanation of the excess observed by NA50 can be given. At RHIC energies the thermal signal is dominated by early emission indicative for QGP formation. Chemical under-saturation effects and the competi...
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Heavy quark production in hadronic reactions is reasonably well described by perturbative QCD. However, in heavy ion collisions, final-state interactions may affect the spectra of produced heavy mesons. At the Relativistic Heavy Ion Collider (RHIC), a dense partonic system, often called the quark gluon plasma (QGP), is expected to be formed at the early stage. Since the QGP may induce a strong ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(98)01389-6