Fluctuations and asymmetric jet events in PbPb collisions at the LHC

Details Fluctuations and asymmetric jet events in PbPb collisions at the LHC Fluctuations and asymmetric jet events in PbPb collisions at the LHC

2011-01-14

arxiv.org/abs/1101.2878v2

Eur.Phys.J.C71:1692,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 5 figures; v2 includes substantial additional material (4 new appendices) and reinforced conclusions

Scientific paper

10.1140/epjc/s10052-011-1692-4

Recent LHC results concerning full jet-quenching in PbPb collisions have been presented in terms of a jet asymmetry parameter, measuring the imbalance between the transverse momenta of leading and subleading jets. We examine the potential sensitivity of this distribution to fluctuations from the heavy-ion background. Our results suggest that a detailed estimate of the true fluctuations would be of benefit in extracting quantitative information about jet quenching. We also find that the apparent impact of fluctuations on the jet asymmetry distribution can depend significantly on the choice of low-pt threshold used for the simulation of the hard pp events.

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