Dilepton production by bremsstrahlung of meson fields in nuclear collisions

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dc.creatorMishustin, I. N.
dc.creatorSatarov, L. M.
dc.creatorStoecker, H.
dc.creatorGreiner, W.
dc.date1997-09-17
dc.date.accessioned2026-07-07T11:09:40Z
dc.date.available2026-07-07T11:09:40Z
dc.descriptionWe study the bremsstrahlung of virtual omega 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 positron-electron and muon pairs produced in central Au+Au collisions are calculated under some simplifying assumptions on the space-time variation of the baryonic current in a nuclear collision process. Comparison with the CERES data for 160 AGev Pb+Au collisions shows that the proposed mechanism gives a noticeable fraction of the observed lepton pairs in the intermediate region of invariant masses. Sensitivity of the dilepton yield to the in-medium modification of masses and widths of vector mesons is demonstrated.
dc.description14 pages
dc.identifierhttps://arxiv.org/abs/hep-ph/9709384
dc.identifierhttp://arxiv.org/abs/hep-ph/9709384
dc.identifierPhys.Rev.C57:2552-2558,1998
dc.identifierdoi:10.1103/PhysRevC.57.2552
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190549
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDilepton production by bremsstrahlung of meson fields in nuclear collisions
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