We report J/@j spectra for transverse momenta p_T>5 GeV/c at mid-rapidity in p+p and Au+Au collisions at sNNsqrt{s_{NN}}sNN =200 GeV. The inclusive J/@j spectrum and the extracted B-hadron feed-down are compared to models incorporating different production mechanisms. We observe significant suppression of the J/@j yields for p_T>5 GeV/c in 0-30% central Au+Au collisions relative to the p+p yield scaled by the number of binary nucleon-nucleon collisions in Au+Au collisions. In 30-60% mid-central collisions, no such suppression is observed. The level of suppression is consistently less than that of high-p_T@p^+/- and low-p_TJ/@j at RHIC and high-p_TJ/@j at the LHC.
J/psi production at high transverse momenta in p+p and Au+Au collisions at root s(NN)=200 GeV
Fazio, S.Membro del Collaboration Group
;
2013-01-01
Abstract
We report J/@j spectra for transverse momenta p_T>5 GeV/c at mid-rapidity in p+p and Au+Au collisions at sNNsqrt{s_{NN}}sNN =200 GeV. The inclusive J/@j spectrum and the extracted B-hadron feed-down are compared to models incorporating different production mechanisms. We observe significant suppression of the J/@j yields for p_T>5 GeV/c in 0-30% central Au+Au collisions relative to the p+p yield scaled by the number of binary nucleon-nucleon collisions in Au+Au collisions. In 30-60% mid-central collisions, no such suppression is observed. The level of suppression is consistently less than that of high-p_T@p^+/- and low-p_TJ/@j at RHIC and high-p_TJ/@j at the LHC.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.