Measurement of production in and Au+Au collisions at = 200 GeV

Adare, A.*; 今井 憲一; 谷田 聖; PHENIX Collaboration*; 他504名*

Physical Review C, 91(2), p.024913_1 - 024913_16, 2015/02

AA2015-0520.pdf:2.14MB

https://doi.org/10.1103/PhysRevC.91.024913

Measurements of bottomonium production in heavy-ion and collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The inclusive yield of the three states, , was measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au+Au and collisions at GeV. The differential cross section at midrapidity was found to be pb in collisions. The nuclear modification factor in the 30% most central Au+Au collisions indicates a suppression of the total state yield relative to the extrapolation from 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.