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Title
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Measurement of jet fragmentation in PbPb and pp collisions at
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Author
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Institution/Organisation
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CMS Collaborat
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Abstract
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| 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 root s(NN) = 2.76 TeV corresponding to an integrated luminosity of 150 mu b(-1) 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 pb(-1). 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. |
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Language
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English
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Source (journal)
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Physical review : C : nuclear physics. - Lancaster, Pa, 1970 - 2015
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Publication
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Lancaster, Pa
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2014
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ISSN
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0556-2813
[print]
1089-490X
[online]
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DOI
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10.1103/PHYSREVC.90.024908
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Volume/pages
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90
:2
(2014)
, 20 p.
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Article Reference
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024908
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ISI
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000341271300005
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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