Intermediate-mass dilepton spectra and the role of secondary hadronic processes in heavy-ion collisions

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dc.creatorLi, G. Q.
dc.creatorGale, C.
dc.date1998-07-02
dc.date.accessioned2026-07-07T11:11:46Z
dc.date.available2026-07-07T11:11:46Z
dc.descriptionWe carry out a study of intermediate-mass (between 1 and 2.5 GeV) dilepton spectra from hadronic interactions in heavy-ion collisions. The processes considered are $ππ\to l{\bar l}$, $πρ\to l{\bar l}$, $πa_1\to l{\bar l}$, $πω\to l{\bar l}$, $K{\bar K}\to l{\bar l}$, and $K{\bar K^*}+c.c \to l{\bar l}$. The elementary cross sections for those are obtained from chiral Lagrangians involving pseudoscalar, vector, and axial-vector mesons. The respective electromagnetic form factors are determined by fitting to experimental data for the reverse processes of $e^+e^-\to hadrons$. Based on this input we calculate cross sections and thermal dilepton emission rates and compare our results with those from other approaches. Finally we use these elementary cross sections with a relativistic transport model and calculate dilepton spectra in S+W collisions at SPS energies. The comparison of our results with experimental data from the HELIOS-3 collaboration indicates the importance of the secondary hadronic contributions to the intermediate-mass dilepton spectra.
dc.description25 pages, including 20 postscript figures
dc.identifierhttps://arxiv.org/abs/nucl-th/9807005
dc.identifierhttp://arxiv.org/abs/nucl-th/9807005
dc.identifierPhys.Rev.C58:2914-2927,1998
dc.identifierdoi:10.1103/PhysRevC.58.2914
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191206
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Experiment
dc.titleIntermediate-mass dilepton spectra and the role of secondary hadronic processes in heavy-ion collisions
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