Fragmentation of Jets Containing a Prompt J/ψ Meson in PbPb and pp Collisions at √sNN = 5.02 TeV

Physics Letters B 2022
Viesturs Veckalns

Jets containing a prompt J/ψ meson are studied in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV, using the CMS detector at the LHC. Jets are selected to be in the transverse momentum range of 30<pT<40GeV. The J/ψ yield in these jets is evaluated as a function of the jet fragmentation variable z, the ratio of the J/ψ pT to the jet pT. The nuclear modification factor, RAA, is then derived by comparing the yield in lead-lead collisions to the corresponding expectation based on proton-proton data, at the same nucleon-nucleon center-of-mass energy. The suppression of the J/ψ yield shows a dependence on z, indicating that the interaction of the J/ψ with the quark-gluon plasma formed in heavy ion collisions depends on the fragmentation that gives rise to the J/ψ meson.

Atslēgas vārdi
CMS | Heavy ions | Jets | Quarkonia
DOI
10.1016/j.physletb.2021.136842
Hipersaite
https://www.sciencedirect.com/science/article/pii/S0370269321007826?via%3Dihub

The CMS Collaboration, A.Tumasyan, W.Adam, V.Veckalns ... [et al.]. Fragmentation of Jets Containing a Prompt J/ψ Meson in PbPb and pp Collisions at √sNN = 5.02 TeV. Physics Letters B, 2022, Vol. 825, Article number 136842. ISSN 0370-2693. Available from: doi:10.1016/j.physletb.2021.136842

Publikācijas valoda
English (en)