J/Ψ and Ψ(2S) Production in p-Pb Collisions at 5.02 TeV with ATLAS

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• 作者：W.K. Brooks ; for the ATLAS Collaboration
• 关键词：Quarkonia ; p-A collisions ; ATLAS ; Quark Gluon Plasma ; QCD
• 刊名：Nuclear and Particle Physics Proceedings
• 出版年：2016
• 出版时间：July-September 2016
• 年：2016
• 卷：276-278
• 期：Complete
• 页码：149-152
• 全文大小：565 K

文摘

The production rates of heavy quarkonia in ion-ion collisions provide sensitive probes in the studies of the hot and dense matter formed in these collisions at high energies. However, a reference for understanding the behavior in the hot medium is necessary; p-A collisions open the possibility to study heavy quarkonia states in a smaller system of much lower average temperature. This is an important step in forming a baseline for understanding A-A collisions, as well as an investigation into the nature of modifications of the parton distributions in the nucleus. Using data collected at the LHC in 2013, we show results on the prompt J/Ψ$\mathrm{J}/\mathrm{\Psi }$ and Ψ(2S)$\mathrm{\Psi }(2\mathrm{S})$ nuclear modification factors and the double ratio, Ψ(2S)$\mathrm{\Psi }(2\mathrm{S})$ divided by J/Ψ$\mathrm{J}/\mathrm{\Psi }$ in p-Pb divided by the same in p-p, in p-Pb collisions at 5.02 TeV. The charmonia states were reconstructed via the dimuon decay channel and the yield is analyzed differentially in bins of transverse momentum, rapidity, and event activity.