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| CMS-HIN-12-013 ; CERN-PH-EP-2014-100 | ||
| Measurement of jet fragmentation in PbPb and pp collisions at $\sqrt{s_{NN}}$ = 2.76 TeV | ||
| CMS Collaboration | ||
| 4 June 2014 | ||
| Phys. Rev. C 90 (2014) 024908 | ||
| Abstract: The jet fragmentation function of inclusive jets with transverse momentum $p_T$ above 100 GeV/c in PbPb collisions has been measured using reconstructed charged particles with $p_T$ above 1 GeV/c 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 $\sqrt{s_{NN}}$ = 2.76 TeV corresponding to an integrated luminosity of 150 inverse-microbarns is used. The results for PbPb collisions as a function of collision centrality and jet transverse momentum are compared to reference distributions based on pp data collected at the same center-of-mass energy in 2013, with an integrated luminosity of 5.3 inverse-picobarns. A centrality-dependent modification of the fragmentation function is found. For the most central collisions, a significant enhancement is observed in the PbPb/pp fragmentation function ratio for charged particles with $p_T$ less than 3 GeV/c. This enhancement is observed for all jet $p_T$ bins studied. | ||
| Links: e-print arXiv:1406.0932 [nucl-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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