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PHENIX measurements of low momentum direct photon radiation

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dc.contributor.authorKhachatryan, V.
dc.contributor.authorAdare, A.
dc.contributor.authorAfanasiev, S.
dc.contributor.authorAidala, C.
dc.contributor.authorBlau, D. S.
dc.contributor.authorRiabov, V.
dc.contributor.authorSamsonov, V.
dc.contributor.authorTaranenko, A.
dc.contributor.authorБлау, Дмитрий Сергеевич
dc.contributor.authorРябов, Виктор Германович
dc.contributor.authorТараненко, Аркадий Владимирович
dc.date.accessioned2024-11-21T16:27:20Z
dc.date.available2024-11-21T16:27:20Z
dc.date.issued2019
dc.description.abstractThe versatility of RHIC allowed the PHENIX collaboration to measure low momentum direct photons from small systems, such as p+p, p+A, d+Au at root s(NN) = 200 GeV as well as from large A+A systems, such as Au+Au and Cu+Cu at 200 GeV and Au+Au at 62.4 GeV and 39 GeV. In these measurements PHENIX has discovered a large excess over the scaled p+p yield of direct photons in A+A collisions, and a non-zero excess over the scaled p+p yield in central p+A collisions. Another PHENIX discovery is that at low-p(T) the integrated yield of direct photons, dN(gamma)/dy, from large systems follows a universal scaling as a function of the charged-particle multiplicity, (dN(ch)/d eta)(alpha), with alpha = 1.25. The observed scaling properties of direct photons from these systems show that the photon production yield increases faster than the charged-particle multiplicity.
dc.format.extentС. 763-766
dc.identifier.citationPHENIX measurements of low momentum direct photon radiation / Khachatryan, V [et al.] // NUCLEAR PHYSICS A. - 2019. - 982. - P. 763-766. - 10.1016/j.nuclphysa.2018.09.069
dc.identifier.doi10.1016/j.nuclphysa.2018.09.069
dc.identifier.urihttps://www.doi.org/10.1016/j.nuclphysa.2018.09.069
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000457515500176
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/19166
dc.relation.ispartofNUCLEAR PHYSICS A
dc.titlePHENIX measurements of low momentum direct photon radiation
dc.typeArticle; Proceedings Paper
dspace.entity.typePublication
oaire.citation.volume982
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