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Measurement of jet fragmentation in PbPb and pp collisions at vsNN = 2.76 TeV

Abstract: The jet fragmentation function of inclusive jets with transverse momentum pT above 100 GeV/c in PbPb collisions has been measured using reconstructed charged particles with pT 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 vsNN = 2.76TeV corresponding to an integrated luminosity of 150 µb-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 pT less than 3 GeV/c. This enhancement is observed for all jet pT bins studied.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Phys. Rev. C, Vol. 90, Num. 2, Pag. 024908 (2014)

Editorial: American Physical Society

 Fecha de publicación: 01/08/2014

Nº de páginas: 20

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevC.90.024908

ISSN: 0556-2813,1089-490X,2469-9985,2469-9993

Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

Url de la publicación: https://doi.org/10.1103/PhysRevC.90.024908