Fluctuations and asymmetric jet events in PbPb collisions at the LHC

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 he...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2011-06, Vol.71 (6), p.1-9, Article 1692
Main Authors: Cacciari, Matteo, Salam, Gavin P., Soyez, Gregory
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Asymmetry
Collisions
Elementary Particles
Estimates
Exact sciences and technology
Fluctuation
Hadrons
Heavy Ions
High Energy Physics - Experiment
High Energy Physics - Phenomenology
Jets
Large Hadron Collider
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Experiment
Nuclear Physics
Nuclear Theory
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quenching
Regular Article - Experimental Physics
Simulation
String Theory
The physics of elementary particles and fields
Thresholds
Variation
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Summary: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.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-011-1692-4