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

Autori
Adare, A. ; ... ; Makek, Mihael ; ... ; Zolin, L.

Kolaboracija
PHENIX Collaboration

Izvornik
Physical review. C, Nuclear physics (0556-2813) 91 (2015), 2; 024913, 16

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
QGP ; Quarkonia ; Upsilon ; Raa ; PHENIX

Sažetak
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 sqrt(s_NN)=200 GeV. The Υ(1S+2S+3S)→e+e− differential cross section at midrapidity was found to be B_ee dσ/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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA