Measurements of the production of muons from heavy-flavour hadron decays in Pb–Pb collisions at √sNN =5.02 and 2.76 TeV using the ALICE detector at the LHC are reported. The nuclear modification factor RAA at √sNN =5.02 TeV is measured at forward rapidity (2.5<4) as a function of transverse momentum pT in central, semi-central, and peripheral collisions over a wide pT interval, 3<20 GeV/c, in which muons from beauty-hadron decays are expected to take over from charm as the dominant source at high pT (pT>7 GeV/c). The RAA shows an increase of the suppression of the yields of muons from heavy-flavour hadron decays with increasing centrality. A suppression by a factor of about three is observed in the 10% most central collisions. The RAA at √sNN =5.02 TeV is similar to that at √sNN =2.76 TeV. The precise RAA measurements have the potential to distinguish between model predictions implementing different mechanisms of parton energy loss in the high-density medium formed in heavy-ion collisions. They place important constraints for the understanding of the heavy-quark interaction with the hot and dense QCD medium.

Acharya S., Adamova D., Adler A., Adolfsson J., Aglieri Rinella G., Agnello M., et al. (2021). Production of muons from heavy-flavour hadron decays at high transverse momentum in Pb–Pb collisions at √sNN = 5.02 and 2.76 TeV. PHYSICS LETTERS. SECTION B, 820, 1-15 [10.1016/j.physletb.2021.136558].

Production of muons from heavy-flavour hadron decays at high transverse momentum in Pb–Pb collisions at √sNN = 5.02 and 2.76 TeV

Alici A.;Arcelli S.;Bellini F.;Carnesecchi F.;Cifarelli L.;Colocci M.;Giacalone M.;Jacazio N.;Scioli G.;
2021

Abstract

Measurements of the production of muons from heavy-flavour hadron decays in Pb–Pb collisions at √sNN =5.02 and 2.76 TeV using the ALICE detector at the LHC are reported. The nuclear modification factor RAA at √sNN =5.02 TeV is measured at forward rapidity (2.5<4) as a function of transverse momentum pT in central, semi-central, and peripheral collisions over a wide pT interval, 3<20 GeV/c, in which muons from beauty-hadron decays are expected to take over from charm as the dominant source at high pT (pT>7 GeV/c). The RAA shows an increase of the suppression of the yields of muons from heavy-flavour hadron decays with increasing centrality. A suppression by a factor of about three is observed in the 10% most central collisions. The RAA at √sNN =5.02 TeV is similar to that at √sNN =2.76 TeV. The precise RAA measurements have the potential to distinguish between model predictions implementing different mechanisms of parton energy loss in the high-density medium formed in heavy-ion collisions. They place important constraints for the understanding of the heavy-quark interaction with the hot and dense QCD medium.
2021
Acharya S., Adamova D., Adler A., Adolfsson J., Aglieri Rinella G., Agnello M., et al. (2021). Production of muons from heavy-flavour hadron decays at high transverse momentum in Pb–Pb collisions at √sNN = 5.02 and 2.76 TeV. PHYSICS LETTERS. SECTION B, 820, 1-15 [10.1016/j.physletb.2021.136558].
Acharya S.; Adamova D.; Adler A.; Adolfsson J.; Aglieri Rinella G.; Agnello M.; Agrawal N.; Ahammed Z.; Ahmad S.; Ahn S.U.; Akbar Z.; Akindinov A.; Al...espandi
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0370269321004986-main.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 900.47 kB
Formato Adobe PDF
900.47 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/847175
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 6
social impact