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HK: Fachverband Physik der Hadronen und Kerne
HK 25: Heavy-Ion Collisions and QCD Phases VI
HK 25.6: Vortrag
Mittwoch, 1. April 2020, 15:15–15:30, J-HS G
Jet-hadron correlations in Pb–Pb collisions at √sNN = 5.02 TeV — •Jiyoung Kim — Physikalisches Inistitut, Heidelberg, Germany
An object which travels faster than the speed of sound in a medium generates a conical pressure wave front, called ’Mach shock wave’. Such shock wave can be produced by hard-scattered partons, which fragment into clusters of hadrons known as ’jets’, which propagate through the Quark-Gluon Plasma (QGP). The jets interact with the QGP and lose a part of their energy in the propagation. The transfered energy from the jets to the medium leads to a increase of soft particle production. An angular correlation analysis allows us to improve our understanding of the interaction between the QGP and jets as well as to enable to search Mach shock wave generated in the medium.
In this presentation, we show angular correlations of inclusive hadrons and identified protons with respect to the axis of charged jets produced in Pb–Pb collisions at √sNN = 5.02 TeV in the ALICE detector. As proton abundance in the medium is relatively higher than that in the jet fragmentation, when we study both the jet-hadron and the jet-proton correlation, it allows us to compare signals which have different amount of jet fragments in the correlation functions. Moreover, in order to enhance possibility to search the Mach shock signal, we studied additional hadron-hadron correlation only around the axis of quenched jet in simulation and in the data analysis. Those results are also presented in this talk.
This work is supported by BMBF and HGS-HIRe.