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Preprint
Report number arXiv:2409.11939 ; CERN-EP-2024-240
Title Investigating charm quark energy loss in medium with the nuclear modification factor of D0-tagged jets
Author(s) Acharya, Shreyasi (Clermont-Ferrand U.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) 顯示全部 1080 名作者
Corporate author(s) The ALICE collaboration
Publication 2024
Collaboration ALICE
Imprint 11 Sep 2024
Number of pages 25
Note 25 pages, 4 captioned figures, authors from page 19, submitted to PLB, figures at http://alice-publications.web.cern.ch/node/11307
Subject category Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ALICE
Keywords relativistic heavy ion physics ; quark gluon plasma ; heavy quark production ; experimental results
Abstract The nuclear modification factor RAA of charm jets, identified by the presence of a D0 meson among the jet constituents, has been measured for the first time in Pb-Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02 TeV with the ALICE detector at the LHC. The D0 mesons and their charge conjugates are reconstructed from the hadronic decay D0Kπ+. Jets are reconstructed from D0-meson candidates and charged particles using the anti-kT algorithm with jet resolution parameter R=0.3, in the jet transverse momentum (pT) range 5<pTchjet<50 GeV/c and pseudorapidity |ηchjet|<0.6. A hint of reduced suppression in the charm-jet RAA is observed in comparison to inclusive jets in central Pb-Pb collisions with a significance of about 2σ in 20<pTchjet<50 GeV/c, suggesting the in-medium energy loss to depend on both the difference between quark and gluon coupling strength (Casimir colour-charge effect) and quark mass (dead-cone effect). The data are compared with model calculations that include mass effects in the in-medium energy loss. Among these, LIDO provides the best description of the data, highlighting the role of mass effects in interpreting the results.
Other source Inspire
Copyright/License Preprint: © 2024 CERN (License: CC-BY-4.0)
Submitted by francesco.prino@cern.ch



 


 記錄創建於2024-09-11,最後更新在2024-11-27


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