https://doi.org/10.1140/epjc/s10052-011-1692-4
Regular Article - Experimental Physics
Fluctuations and asymmetric jet events in PbPb collisions at the LHC
1
LPTHE, UPMC Univ. Paris 6 and CNRS UMR 7589, Paris, France
2
Université Paris Diderot, Paris, France
3
Department of Physics, Theory Unit, CERN, 1211, Geneva 23, Switzerland
4
Department of Physics, Princeton University, Princeton, NJ, 08544, USA
5
Institut de Physique Théorique, CEA Saclay, CNRS URA 2306, 91191, Gif-sur-Yvette, France
* e-mail: cacciari@lpthe.jussieu.fr
Received:
14
February
2011
Revised:
2
June
2011
Published online:
29
June
2011
Recent LHC results concerning full jet-quenching in Pb Pb 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-p t threshold used for the simulation of the hard pp events.
© Springer-Verlag / Società Italiana di Fisica, 2011