In-medium modification of dijets in PbPb collisions at $$\sqrt{s_{\mathrm{NN}}}$$ = 5.02 TeV
A bstract Modifications to the distribution of charged particles with respect to high transverse momentum ( p T ) jets passing through a quark-gluon plasma are explored using the CMS detector. Back-to-back dijets are analyzed in lead-lead and proton-proton collisions at $$\sqrt{s_{\mathrm{NN}}}$$ s NN = 5 . 02 TeV via correlations of charged particles in bins of relative pseudorapidity and angular distance from the leading and subleading jet axes. In comparing the lead-lead and proton-proton collision results, modifications to the charged-particle relative distance distribution and to the momentum distributions around the jet axis are found to depend on the dijet momentum balance x j , which is the ratio between the subleading and leading jet p T . For events with x j ≈ 1, these modifications are observed for both the leading and subleading jets. However, while subleading jets show significant modifications for events with a larger dijet momentum imbalance, much smaller modifications are found for the leading jets in these events.
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Publication Date:
NSF-PAR ID:
10249916
Journal Name:
Journal of High Energy Physics
Volume:
2021
Issue:
5
ISSN:
1029-8479
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