Investigating charm quark energy loss in medium with the nuclear modification factor of D0 -tagged jets
  • Acharya, S.
  • Agarwal, A.
  • Rinella, G. Aglieri
  • Aglietta, L.
  • Agnello, M.
  • 외 1,063명
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초록

The nuclear modification factor R-AA of charm jets, identified by the presence of a D-0 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 root s(NN) = 5.02 TeV with the ALICE detector at the LHC. The D-0 mesons and their charge conjugates are reconstructed from the hadronic decay D-0 -> K-pi(+). Jets are reconstructed from D-0-meson candidates and charged particles using the anti-k(T) algorithm with jet resolution parameter R = 0.3, in the jet transverse momentum (p(T)) range 5 <p(T)(ch jet) < 50 GeV/c and pseudorapidity |eta(ch jet)| < 0.6. A hint of reduced suppression in the charm-jet R-AA is observed in comparison to inclusive jets in central Pb-Pb collisions with a significance of about 2 sigma in 20 <p(T)(ch jet) < 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. 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 D-0-tagged jets, highlighting the role of mass effects in interpreting the results.

키워드

PBPB COLLISIONSHEAVYSUPPRESSIONZEROTEVQCDPP
제목
Investigating charm quark energy loss in medium with the nuclear modification factor of D0 -tagged jets
저자
Acharya, S.Agarwal, A.Rinella, G. AglieriAglietta, L.Agnello, M.Agrawal, N.Ahammed, Z.Ahmad, S.Ahn, S. U.Ahuja, I.Akindinov, A.Akishina, V.Al-Turany, M.Aleksandrov, D.Alessandro, B.Alfanda, H. M.Molina, R. AlfaroAli, B.Alici, A.Alizadehvandchali, N.Alkin, A.Alme, J.Alocco, G.Alt, T.Altamura, A. R.Altsybeev, I.Alvarado, J. R.Anaam, M. N.Andrei, C.Andreou, N.Andronic, A.Andronov, E.Anguelov, V.Antinori, F.Antonioli, P.Apadula, N.Aphecetche, L.Appelshauser, H.Arata, C.Arcelli, S.Arnaldi, R.Arneiro, J. G. M. C. A.Arsene, I. C.Arslandok, M.Augustinus, A.Averbeck, R.Averyanov, D.Azmi, M. D.Baba, H.Badala, A.Bae, J.Baek, Y. W.Bai, X.Bailhache, R.Bailung, Y.Bala, R.Balbino, A.Baldisseri, A.Balis, B.Banoo, Z.Barbasova, V.Barile, F.Barioglio, L.Barlou, M.Barman, B.Barnafoldi, G. G.Barnby, L. S.Barreau, E.Barret, V.Barreto, L.Bartels, C.Barth, K.Bartsch, E.Bastid, N.Basu, S.Batigne, G.Battistini, D.Batyunya, B.Bauri, D.Alba, J. L. BazoBearden, I. 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DOI
10.1016/j.physletb.2026.140299
발행일
2026-04
유형
Article
저널명
PHYSICS LETTERS B
875