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In-medium modification of dijets in PbPb collisions at root s(NN)=5.02 TeV

Abstract: Modifications to the distribution of charged particles with respect to high transverse momentum (pT) 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 p sNN = 5.02TeV 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 xj , which is the ratio between the subleading and leading jet pT. For events with xj _ 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.

 Fuente: Journal of High Energy Physics, 2021, 05,116

 Editorial: Springer Verlag

 Fecha de publicación: 14/05/2021

 Nº de páginas: 44

 Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP05(2021)116

 ISSN: 1126-6708,1029-8479