Suppression of Excited States Relative to the Ground State in Pb-Pb Collisions at s NN=5.02 TeV

CMS Collaboration

研究成果: 雜誌貢獻期刊論文同行評審

56 引文 斯高帕斯(Scopus)

摘要

The relative yields of mesons produced in pp and Pb-Pb collisions at sNN=5.02 TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, (2S) and (3S), to the ground state, (1S), in both Pb-Pb and pp collisions at the same center-of-mass energy. The double ratios, [(nS)/(1S)]Pb-Pb/[(nS)/(1S)]pp, are measured to be 0.308±0.055(stat)±0.019(syst) for the (2S) and less than 0.26 at 95% confidence level for the (3S). No significant (3S) signal is found in the Pb-Pb data. The double ratios are studied as a function of collision centrality, as well as transverse momentum and rapidity. No significant dependencies are observed.

原文???core.languages.en_GB???
文章編號142301
期刊Physical Review Letters
120
發行號14
DOIs
出版狀態已出版 - 2 4月 2018

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