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<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.

Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Ero, J., Escalante Del Valle, A., et al. (2022). Fragmentation of jets containing a prompt J/ψ meson in PbPb and pp collisions at s =5.02TeV. PHYSICS LETTERS. SECTION B, 825 [10.1016/j.physletb.2021.136842].

Fragmentation of jets containing a prompt J/ψ meson in PbPb and pp collisions at s =5.02TeV

Benaglia A.;Beschi A.;Brivio F.;Cetorelli F.;Ciriolo V.;De Guio F.;Dinardo M. E.;Ghezzi A.;Govoni P.;Guzzi L.;Malberti M.;Monti F.;Moroni L.;Paganoni M.;Ragazzi S.;Tabarelli de Fatis T.;Valsecchi D.;Zuolo D.;Ortona G.;Massironi A.;Gerosa R.;Lucchini M. T.;
2022

Abstract

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<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.
Articolo in rivista - Articolo scientifico
CMS; Heavy ions; Jets; Quarkonia;
English
27-dic-2021
2022
825
136842
none
Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Ero, J., Escalante Del Valle, A., et al. (2022). Fragmentation of jets containing a prompt J/ψ meson in PbPb and pp collisions at s =5.02TeV. PHYSICS LETTERS. SECTION B, 825 [10.1016/j.physletb.2021.136842].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/429518
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