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HK: Fachverband Physik der Hadronen und Kerne
HK 69: Heavy-Ion Collisions and QCD Phases XVI
HK 69.5: Vortrag
Donnerstag, 14. März 2024, 16:45–17:00, HBR 62: EG 05
Measurement of inclusive jet suppression in Pb–Pb collisions at √sNN = 5.02 TeV with a novel mixed-event approach — •Nadine Alice Grünwald — Physikalisches Institut Universität Heidelberg
QCD matter is studied at very high temperatures and densities utilizing heavy-ion collisions. The ALICE experiment is dedicated to measure heavy-ion collisions at the LHC. The Quark-Gluon Plasma (QGP) is produced in those collisions where quarks and gluons are deconfined and new physics phenomena emerge. The QGP can be studied using jets, which are produced in the early stage of the collisions. Depending on the structure of the QGP, the jets lose energy mainly due to collisional and radiative energy loss. A major difficulty in heavy-ion jet measurements is the huge amount of uncorrelated particles from the underlying event. Those bulk particles smear out the jet measurement itself and are responsible for fake jets. In order to perform low pT jet measurements, a novel mixed-event technique is exploited. In this talk the mixed events as a new approach to describe the uncorrelated background in heavy-ion jet measurements at ALICE are presented. The description of the uncorrelated background by mixed events enables the inclusive charged-particle jet measurement down to pT = 13.5 GeV/c at collision energies of √sNN = 5.02 TeV. We can compare for the first time the jet yield suppression due to quenching at RHIC and the LHC in the same kinematic range. In addition, the results are compared to various model predictions.
Keywords: Inclusive jet measurement; Mixed-event