Initial state effects on dilepton production in nuclear collisions
نویسندگان
چکیده
منابع مشابه
Collective mechanism of dilepton production in high–energy nuclear collisions
Collective bremsstrahlung of vector meson fields in relativistic nuclear collisions is studied within the time–dependent Walecka model. Mutual deceleration of the colliding nuclei is described by introducing the effective stopping time and average rapidity loss of baryons. It is shown that electromagnetic decays of virtual ω–mesons produced by bremsstrahlung mechanism can provide a substantial ...
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We study the bremsstrahlung of virtual ω–mesons due to the collective deceleration of nuclei at the initial stage of an ultrarelativistic heavy–ion collision. It is shown that electromagnetic decays of these mesons may give an important contribution to the observed yields of dileptons. Mass spectra of e+e− and μ+μ− pairs produced in central Au+Au collisions are calculated under some simplifying...
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The present status of our understanding of low mass dilepton production in relativistic heavy ion collisions is discussed. The focus of the discussion will be the sensitivity of dilepton measurements to in medium changes of hadrons and the restoration of chiral symmetry. We will finally discuss how the presence of strong long wavelength pion modes, i.e. disoriented chiral condensates can be see...
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Many probes have been proposed to map out the behaviour of hot and dense hadronic matter and also to highlight its eventual transition to a plasma of quarks and gluons. It is outside the scope of this talk to review them all or even partially: we will concentrate on electromagnetic radiation and more specifically on the emission of thermal lepton pairs. Those suffer minimal final state interact...
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GRAPE-Dilepton is a Monte Carlo event generator for dilep-ton production in ep collisions. The cross-section calculation is based on the exact matrix elements in the electroweak theory at tree level. The dilepton productions via , Z 0 , Z 0 Z 0 collisions and via photon internal conversion are taken into account. In addition, the eeects of the Z 0 on/oo-shell production are also included. The r...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 1991
ISSN: 0375-9474
DOI: 10.1016/0375-9474(91)90367-f