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Modification of jet shapes in PbPb collisions at vsNN = 2.76 TeV

Abstract: The first measurement of jet shapes, defined as the fractional transverse momentum radial distribution, for inclusive jets produced in heavy-ion collisions is presented. Data samples of PbPb and pp collisions, corresponding to integrated luminosities of 150 µb-1 and 5.3 pb-1 respectively, were collected at a nucleon–nucleon centre-of-mass energy of vsNN = 2.76 TeV with the CMS detector at the LHC. The jets are reconstructed with the anti-kT algorithm with a distance parameter R = 0.3, and the jet shapes are measured for charged particles with transverse momentum pT > 1 GeV/c. The jet shapes measured in PbPb collisions in different collision centralities are compared to reference distributions based on the pp data. A centrality-dependent modification of the jet shapes is observed in the more central PbPb collisions, indicating a redistribution of the energy inside the jet cone. This measurement provides information about the parton shower mechanism in the hot and dense medium produced in heavy-ion collisions.

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

 Fuente: Physics Letters B, Vol.730, Pp 243–263, (2014)

Editorial: Elsevier

 Fecha de publicación: 01/03/2014

Nº de páginas: 21

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.physletb.2014.01.042

ISSN: 0370-2693,1873-2445

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

Url de la publicación: https://doi.org/10.1016/j.physletb.2014.01.042