Energy And System Size Dependence Of φ{symbol} Meson Production In Cu + Cu And Au + Au Collisions

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dc.date2009
dc.date2015-06-26T13:36:41Z
dc.date2015-11-26T15:37:03Z
dc.date2015-06-26T13:36:41Z
dc.date2015-11-26T15:37:03Z
dc.date.accessioned2018-03-28T22:45:31Z
dc.date.available2018-03-28T22:45:31Z
dc.identifier
dc.identifierPhysics Letters, Section B: Nuclear, Elementary Particle And High-energy Physics. , v. 673, n. 3, p. 183 - 191, 2009.
dc.identifier3702693
dc.identifier10.1016/j.physletb.2009.02.037
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-61549120376&partnerID=40&md5=ef5be031b6ca68165647a7d5067d1140
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/92611
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/92611
dc.identifier2-s2.0-61549120376
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1263568
dc.descriptionWe study the beam-energy and system-size dependence of φ{symbol} meson production (using the hadronic decay mode φ{symbol} → K+ K-) by comparing the new results from Cu + Cu collisions and previously reported Au + Au collisions at sqrt(sNN) = 62.4 and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity (| y | < 0.5) for 0.4 < pT < 5 GeV / c. At a given beam energy, the transverse momentum distributions for φ{symbol} mesons are observed to be similar in yield and shape for Cu + Cu and Au + Au colliding systems with similar average numbers of participating nucleons. The φ{symbol} meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from p + p collisions. The enhancement for φ{symbol} mesons lies between strange hadrons having net strangeness =1 (K- and over(Λ, ̄)) and net strangeness =2 (Ξ). The enhancement for φ{symbol} mesons is observed to be higher at sqrt(sNN) = 200 GeV compared to 62.4 GeV. These observations for the produced φ{symbol} (s over(s, ̄)) mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems. © 2009 Elsevier B.V.
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dc.relationPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
dc.rightsaberto
dc.sourceScopus
dc.titleEnergy And System Size Dependence Of φ{symbol} Meson Production In Cu + Cu And Au + Au Collisions
dc.typeArtículos de revistas


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