Modification of jet shapes in PbPb collisions at √sNN=2.76TeV

By S. Chatrchyan, V. Khachatryan, A. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, C. Fabjan, M. Friedl and 2,192 more. 2014

196 citations recorded by the source corpus.

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 View the MathML sourcesNN=2.76 TeV with the CMS detector at the LHC. The jets are reconstructed with the anti-kTkT algorithm with a distance parameter R=0.3R=0.3, and the jet shapes are measured for charged particles with transverse momentum pT>1 GeV/cpT>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.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6d30ddfefadc99ee4f69dedb2fd0aca1d51c90f1

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In Nuclear and High Energy Physics

1. G. Qin
2. Xin-Nian Wang

Citations in the corpus

• Jet quenching in high-energy heavy-ion collisions (2015, methodology): “Later, CMS Collaboration included the charged particles with lower values of pT in the reconstruction of full jets and a clear nuclear modification of the inclusive jet fragmentation function was observed.(16) Fig.”