منابع مشابه
Thermal photons and dileptons
The study of penetrating probes constitutes a key aspect of the relativistic heavy ion program. In the hadronic sector, jet quenching, for example, has been a striking revelation, and has contributed to expose the qualitatively different physics that appeared in the transition from the SPS to RHIC. In this context, electromagnetic radiation also defines a privileged class of observables owing m...
متن کاملDirect photons and thermal dileptons: A theoretical review
The measurement of electromagnetic probes provides a valuable and a necessary complement to that of hadronic observables in an environment as potentially complex as that of ultrarelativistic heavy ion collisions. This fact owes partly to the weakness of final-state interactions in photon emission (real or virtual) but is also related to the richness of the information carried by the electromagn...
متن کاملDileptons And Photons At RHIC Energies
Comparing dilepton data from Au+Au to p+p collisions at RHIC energies PHENIX revealed two striking features: (i) a large excess of the dilepton yield at low mass and low pT in central Au+Au and (ii) a significant enhancement of direct real photon radiation. Both features can be interpreted as thermal radiation from the hot quark matter produced at RHIC. Unlike at lower beam energies, at RHIC th...
متن کاملDileptons and Direct Photons at SPS
The study of dilepton and direct photon emission was one of the main topics of the experimental program at the SPS devoted to the search of signals for QGP formation. Three generations of experiments, Helios-3, NA38/NA50, CERES and NA60 measured e+e− or μ+μ− production in various colliding systems and at different energies. While lepton pair production in p-A collisions was found to be reasonab...
متن کامل0 v 1 2 0 M ay 1 99 7 PHOTONS , DILEPTONS AND HARD THERMAL LOOPS
The production rate of soft real photons or soft lepton pairs by a hot QCD plasma is dominated by strong collinear divergences. As a consequence, it appears that the effective theory based on the resummation of hard thermal loops fails to handle properly these light-cone sensitive processes since some formally higher order diagrams are in reality the dominant ones. ENSLAPP-A-646/97 hep-ph/97053...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2006
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2006.06.053