Centrality dependence of charged jet production in p-Pb collisions at $\sqrt{s_\rm{NN}} = 5.02$ TeV

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5.02 TeV
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Proton–lead collisions were recorded in 2013 at sqrt(sNN) = 5.02 TeV with the ALICE detector. While preliminary minimum bias results exist since July 2013, until the end of 2014 there was no centrality estimation approach, which was commonly accepted by the ALICE collaboration. However, much effort have been spent by the ALICE p–Pb centrality task force to create a reliable, least-biased
centrality estimate [1].
In this analysis note, charged jet production in p–Pb is examined for different centrality classes. The focus is on the novel “hybrid centrality approach”, but also results for NBD-Glauber centrality are shown. Fully corrected charged jet production spectra, nuclear modification factors QpPb and the central over minimum bias ratio RCM are presented. Additionally, the jet cross section ratio as an indicator for strong changes in the jet radial structure is shown.
The present considerations rely mainly on the analysis done for minimum bias collisions in interplay with the centrality definition. The note will present the properties and results of the centrality dependence of jets. Details of the charged jet analysis like correction techniques, data sample etc. are left out here, because they can be found in the corresponding minimum bias analysis note, https://aliceinfo.cern.ch/Notes/node/178. The minimum bias analysis is submitted to PLB and is already published in [1].

Exhausting details on centrality in p–Pb can be found in [2].

[1] ALICE Collaboration, [nucl-ex/1503.00681]

[2] ALICE Collaboration, [nucl-ex/1412.6828]

PF: https://indico.cern.ch/event/399996/session/3/contribution/10/attachment...