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Multi-differential pattern of low-mass e(+)e(-) excess from root S-NN=2.4 GeV Au+Au collisions with HADES

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dc.contributor.authorHarabasz, S.
dc.contributor.authorAdamczewski-Musch, J.
dc.contributor.authorArnold, O.
dc.contributor.authorArnoldi-Meadows, B.
dc.contributor.authorGolosov, O.
dc.contributor.authorMorozov, S.
dc.contributor.authorSelyuzhenkov, I.
dc.contributor.authorStrikhanov, M.
dc.contributor.authorTaranenko, A.
dc.contributor.authorГолосов, Олег Владимирович
dc.contributor.authorСтриханов, Михаил Николаевич
dc.contributor.authorТараненко, Аркадий Владимирович
dc.date.accessioned2024-11-21T16:27:49Z
dc.date.available2024-11-21T16:27:49Z
dc.date.issued2019
dc.description.abstractThe matter formed in central heavy-ion collisions at a few GeV per nucleon is commonly understood as resonance matter, a gas of nucleons and excited baryon states with a substantial contribution from mesonic, mostly pionic excitations. Yet, in the initial phase of the reaction the system is compressed to beyond nuclear ground state density and hence substantial modifications of the hadron properties are expected to occur. The spectral distribution of virtual photons measured in Au+Au collisions at 2.4 GeV center of mass energy indicates strong medium effects beyond pure superposition of individual NN collisions. We present multi-differential distributions of low-mass electron pairs. This radiation is remarkably well described assuming emission from a thermalized system. To gain deeper understanding of the microscopic origin of the radiation, we extracted the centrality dependent true (not blue-shifted) temperature, its azimuthal distribution, as well as mass-dependent effective slope parameter. Virtual photon spectra are confronted with available model calculations.
dc.format.extentС. 771-774
dc.identifier.citationMulti-differential pattern of low-mass e(+)e(-) excess from root S-NN=2.4 GeV Au+Au collisions with HADES / Harabasz, S [et al.] // NUCLEAR PHYSICS A. - 2019. - 982. - P. 771-774. - 10.1016/j.nuclphysa.2018.09.052
dc.identifier.doi10.1016/j.nuclphysa.2018.09.052
dc.identifier.urihttps://www.doi.org/10.1016/j.nuclphysa.2018.09.052
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000457515500178
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/19167
dc.relation.ispartofNUCLEAR PHYSICS A
dc.titleMulti-differential pattern of low-mass e(+)e(-) excess from root S-NN=2.4 GeV Au+Au collisions with HADES
dc.typeArticle; Proceedings Paper
dspace.entity.typePublication
oaire.citation.volume982
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