Abstract
A typical approach to study the medium produced in heavy ion collisions is to understand the passage of elementary particles through it. As Z bosons and photons do not participate in the strong interaction, their correlation with jets within the same event is a clean probe of the medium-induced energy loss of (predominantly) quark jets. In this analysis, Z+jet and photon+jet correlations are studied using the high statistics PbPb and pp data taken at a center-of-mass energy of sNN=5.02 TeV with the CMS detector. The evolution of azimuthal angular distributions and average momentum imbalance between the jet and Z or photon as a function of transverse momentum of the color neutral probe will be presented. In addition the jet IAA, as a function of photon pT and collision centrality is studied.
Highlights
High energy quarks and gluons, in the form of jets, are important probes for studying the properties of the quark-gluon plasma (QGP) created in ultra-relativistic heavy ion collisions
As Z bosons and photons do not participate in the strong interaction, their correlation with jets within the same event is a clean probe of the medium-induced energy loss of quark jets
Jets are expected to lose energy as they travel through the hot dense medium. This phenomenon is known as jet quenching and has been observed both at RHIC [1] and at the LHC [2] in various studies, including measurements of the dijet asymmetry [3] [4]
Summary
High energy quarks and gluons, in the form of jets, are important probes for studying the properties of the quark-gluon plasma (QGP) created in ultra-relativistic heavy ion collisions. Jets are expected to lose energy as they travel through the hot dense medium This phenomenon is known as jet quenching and has been observed both at RHIC [1] and at the LHC [2] in various studies, including measurements of the dijet asymmetry [3] [4]. The centre-of-mass energy was 5.02 TeV, and a total integrated luminosity of 404 μb−1 and 27.4 pb−1 of PbPb and pp collision data was collected This high statistics dataset enabled the first measurement of Z+jet correlations in heavy ion collisions to be made, in addition to a more precise measurement of the photon+jet correlations. More details can be found in the CMS physics analysis summaries (PAS) HIN-15-013 [6] and HIN-16-002 [7]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
