Abstract
The relative modification of the prompt and yields from to PbPb collisions, at the center-of-mass energy of 5.02 TeV per nucleon pair, is presented. The analysis is based on and PbPb data samples collected by the CMS experiment at the LHC in 2015, corresponding to integrated luminosities of and , respectively. The double ratio of measured yields of prompt charmonia reconstructed through their decays into muon pairs, , is determined as a function of PbPb collision centrality and charmonium transverse momentum , in two kinematic intervals: covering and covering . The centrality-integrated double ratios are in the first interval and in the second. The double ratio is lower than unity in all the measured bins, suggesting that the yield is more suppressed than the yield in the explored phase space.
- Received 4 November 2016
DOI:https://doi.org/10.1103/PhysRevLett.118.162301
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© 2017 CERN, for the CMS