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Investigating charm quark energy loss in medium with the nuclear modification factor of D0-tagged jets

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...

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Autori principali: Acharya, Shreyasi (Autore) , Angelov, Venelin (Autore) , Berdnikova, Anastasia (Autore) , Bergmann, Luisa (Autore) , Bórquez Cárcamo, Andrés G. (Autore) , Fokin, Ilya D. (Autore) , Glässel, Peter (Autore) , Grünwald, Nadine (Autore) , Nath, Abhishek (Autore) , Pachmayer, Yvonne C. (Autore) , Reygers, Klaus (Autore) , Schicker, Rainer (Autore) , Schlepper, Felix (Autore) , Seo, Jinjoo (Autore) , Stachel, Johanna (Autore) , Stiefelmaier, Stephan (Autore) , Veen, Casper Arie van (Autore) , Windelband, Bernd (Autore) , Zanone, Federica (Autore) , Zhang, Biao (Autore)
Ente Autore: ALICE (Autore)
Natura: Article (Journal) Editorial
Lingua:inglese
Pubblicazione: April 2026
In: Physics letters
Year: 2026, Volume: 875, Pages: 1-14
ISSN:1873-2445
DOI:10.1016/j.physletb.2026.140299
Accesso online:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2026.140299
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S037026932600153X
Testo
Note sull'autore:ALICE Collaboration*
Descrizione
Riassunto: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 D0→K−π+. 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 |ηch jet|<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< 50GeV/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. Several state-of-the-art models are consistent with the data, with the LIDO model providing the best description of the data in the common kinematic range of inclusive and D0-tagged jets, highlighting the role of mass effects in interpreting the results.
Descrizione del documento:Online verfügbar: 28. Februar 2026, Artikelversion: 12. März 2026
*ALICE Collaboration: S. Acharya, V. Anguelov, A. Berdnikova, L. Bergmann, A.G. Borquez Carcamo, I. Fokin, P. Glässel, N.A. Grunwald, A. Nath, Y. Pachmayer, K. Reygers, R. Schicker, F. Schlepper, J.J. Seo, J. Stachel, S.F. Stiefelmaier, C.A. van Veen, B. Windelband, F. Zanone, B. Zhang [und 1060 weitere Personen]
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Gesehen am 18.06.2026
Descrizione fisica:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2026.140299

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