In-medium effects on particle production in heavy ion collisions

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dc.creatorPrassa, V.
dc.creatorFerini, G.
dc.creatorGaitanos, T.
dc.creatorWolter, H. H.
dc.creatorLalazissis, G. A.
dc.creatorDi Toro, M.
dc.date2007-04-04
dc.date.accessioned2026-07-07T10:59:23Z
dc.date.available2026-07-07T10:59:23Z
dc.descriptionThe effect of possible in-medium modifications of nucleon-nucleon ($NN$) cross sections on particle production is investigated in heavy ion collisions ($HIC$) at intermediate energies. In particular, using a fully covariant relativistic transport approach, we see that the density dependence of the {\it inelastic} cross sections appreciably affects the pion and kaon yields and their rapidity distributions. However, the $(π^{-}/π^{+})$- and $(K^{0}/K^{+})$-ratios depend only moderately on the in-medium behavior of the inelastic cross sections. This is particularly true for kaon yield ratios, since kaons are more uniformly produced in high density regions. Kaon potentials are also suitably evaluated in two schemes, a chiral perturbative approach and an effective meson-quark coupling method, with consistent results showing a similar repulsive contribution for $K^{+}$ and $K^{0}$. As a consequence we expect rather reduced effects on the yield ratios. We conclude that particle ratios appear to be robust observables for probing the nuclear equation of state ($EoS$) at high baryon density and, particularly, its isovector sector.
dc.description29 pages, 15 figures, accepted for publication in Nuclear Physics A
dc.identifierhttps://arxiv.org/abs/0704.0554
dc.identifierhttp://arxiv.org/abs/0704.0554
dc.identifierNucl.Phys.A789:311-333,2007
dc.identifierdoi:10.1016/j.nuclphysa.2007.02.014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187385
dc.subjectNuclear Theory
dc.titleIn-medium effects on particle production in heavy ion collisions
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