Abstract
The jet fragmentation function of inclusive jets with transverse momentum above in PbPb collisions has been measured using reconstructed charged particles with above in a cone of radius 0.3 around the jet axis. A data sample of PbPb collisions collected in 2011 at a nucleon-nucleon center-of-mass energy of corresponding to an integrated luminosity of is used. The results for PbPb collisions as a function of collision centrality and jet transverse momentum are compared to reference distributions based on data collected at the same center-of-mass energy in 2013, with an integrated luminosity of . A centrality-dependent modification of the fragmentation function is found. For the most central collisions, a significant enhancement is observed in the PbPb/ fragmentation function ratio for charged particles with less than . This enhancement is observed for all jet bins studied.
1 More- Received 3 June 2014
DOI:https://doi.org/10.1103/PhysRevC.90.024908
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©2014 CERN, for the CMS Collaboration