München 2019 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 4: Heavy-Ion Collisions and QCD Phases I
HK 4.2: Vortrag
Montag, 18. März 2019, 14:30–14:45, HS 15
Jet-hadron correlations in Pb–Pb collisions at √sNN = 5.02 TeV — •Jiyoung Kim for the ALICE collaboration — Physikalisches Institut, Heidelberg University
The Quark-Gluon Plasma, a state of matter in which quarks and gluons are deconfined from nuclei, is produced in the early stages of our universe and also in ultra-relativistic heavy ion collisions. A Large Ion Collider Experiment (ALICE) aims to investigate properties of this strongly-interacting medium under extreme experimental conditions. Hard-scattered partons, which fragment into clusters of hadrons known as ’jets’, are created in the initial stages of the collision, and then propagate through the medium. The interaction between partons and the medium leads to a modification of the jet properties, such as broadening, energy loss, and an additional medium response triggered by jets. By investigating the angular correlation between hadrons and jets, we explore the interaction between partons and the medium and quantitatively study the medium response around jets.
We present an analysis of angular correlations of inclusive hadrons and identified protons with respect to the axis of charged jets in Pb–Pb collisions at √sNN = 5.02 TeV with the ALICE detector. The correlation functions are fully corrected for detector acceptance and tracking efficiency. Although both the jet-hadron and the jet-proton correlations contain the medium response, since the proton abundance in the medium is relatively higher than in jet fragmentation, we expect to see an amplified medium signal in the jet-proton correlations.
This work is supported by BMBF and HGS-HIRe.