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Article Dans Une Revue Physical Review C Année : 2015

Measurement of Υ(1S+2S+3S) production in p+p and Au+Au collisions at sNN=200 GeV

Résumé

Measurements of bottomonium production in heavy ion and p+p collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The inclusive yield of the three Υ states, Υ(1S+2S+3S), was measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au+Au and p+p collisions at sNN=200 GeV. The Υ(1S+2S+3S)e+e differential cross section at midrapidity was found to be Beedσ/dy= 108 ± 38 (stat) ± 15 (syst) ± 11 (luminosity) pb in p+p collisions. The nuclear modification factor in the 30% most central Au+Au collisions indicates a suppression of the total Υ state yield relative to the extrapolation from p+p collision data. The suppression is consistent with measurements made by STAR at RHIC and at higher energies by the CMS experiment at the Large Hadron Collider.

Dates et versions

in2p3-00992857 , version 1 (19-05-2014)

Identifiants

Citer

A. Adare, Laurent Aphecetche, E. T. Atomssa, T. Dahms, D. d'Enterria, et al.. Measurement of Υ(1S+2S+3S) production in p+p and Au+Au collisions at sNN=200 GeV. Physical Review C, 2015, 91, pp.024913. ⟨10.1103/PhysRevC.91.024913⟩. ⟨in2p3-00992857⟩
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