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 4.6: Vortrag
Montag, 18. März 2019, 15:30–15:45, HS 15
RAA studies in Xe-Xe and Pb-Pb collisions with ALICE — •Richard Kaiser for the ALICE collaboration — Physikalisches Institut, University of Heidelberg
Transverse momentum (pT) spectra of charged particles at mid-pseudorapidity in Xe-Xe collisions at √sNN = 5.44 TeV measured with the ALICE apparatus at the Large Hadron Collider (LHC) are reported. The kinematic range 0.15<pT<50 GeV/c and |η|<0.8 is covered. Results are presented in nine classes of collision centrality in the 0-80% range. The charged-particle multiplicity dNch/dη|η|<0.8 in Pb-Pb collisions is matched to those in Xe-Xe collisions. The nuclear modification factor (RAA) in central Xe-Xe collisions and Pb-Pb collisions shows a remarkable similarity at pT < 1 GeV/c. These results from the two colliding systems with significantly different size provide insight on the path length dependence of medium-induced parton energy loss.