Study of Jet Quenching with Z+jet Correlations in Pb-Pb and pp Collisions at √sNN=5.02 TeV
Martinez Ruiz del Arbol, Pablo
Meinhard, Maren T.
Tavolaro, Vittorio R.
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
The production of jets in association with Z bosons, reconstructed via the μ+μ− and e+e− decay channels, is studied in pp and, for the first time, in Pb-Pb collisions. Both data samples were collected by the CMS experiment at the LHC, at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The Pb-Pb collisions were analyzed in the 0%–30% centrality range. The back-to-back azimuthal alignment was studied in both pp and Pb-Pb collisions for Z bosons with transverse momentum pZT>60 GeV/c and a recoiling jet with pjetT>30 GeV/c. The pT imbalance xjZ=pjetT/pZT, as well as the average number of jet partners per Z, RjZ, was studied in intervals of pZT. The RjZ is found to be smaller in Pb-Pb than in pp collisions, which suggests that in Pb-Pb collisions a larger fraction of partons associated with the Z bosons fall below the 30 GeV/c pjetT threshold because they lose energy Show more
Journal / seriesPhysical Review Letters
PublisherAmerican Physical Society
Organisational unit03593 - Dissertori, Günther
08803 - Grab, Christoph (Tit.Prof.)
03904 - Wallny, Rainer
03381 - Pauss, Felicitas (emeritus)
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