Production cross sections of [Formula presented], [Formula presented], and [Formula presented] states decaying into [Formula presented] in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at sNN=5.02TeV. A comparison is made with corresponding cross sections obtained with pp data measured at the same collision energy and scaled by the Pb nucleus mass number. The nuclear modification factor for [Formula presented] is found to be [Formula presented]. Similar results for the excited states indicate a sequential suppression pattern, such that [Formula presented]. The suppression of all states is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum [Formula presented] and center-of-mass rapidity [Formula presented] of the individual [Formula presented] state in the studied range [Formula presented] and [Formula presented]. Models that incorporate final-state effects of bottomonia in pPb collisions are in better agreement with the data than those which only assume initial-state modifications.

Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Dragicevic, M., Ero, J., et al. (2022). Nuclear modification of Y states in pPb collisions at sNN=5.02TeV. PHYSICS LETTERS. SECTION B, 835 [10.1016/j.physletb.2022.137397].

Nuclear modification of Y states in pPb collisions at sNN=5.02TeV

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

Abstract

Production cross sections of [Formula presented], [Formula presented], and [Formula presented] states decaying into [Formula presented] in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at sNN=5.02TeV. A comparison is made with corresponding cross sections obtained with pp data measured at the same collision energy and scaled by the Pb nucleus mass number. The nuclear modification factor for [Formula presented] is found to be [Formula presented]. Similar results for the excited states indicate a sequential suppression pattern, such that [Formula presented]. The suppression of all states is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum [Formula presented] and center-of-mass rapidity [Formula presented] of the individual [Formula presented] state in the studied range [Formula presented] and [Formula presented]. Models that incorporate final-state effects of bottomonia in pPb collisions are in better agreement with the data than those which only assume initial-state modifications.
Articolo in rivista - Articolo scientifico
Bottomonium; CMS; Heavy ion collisions; Quark-gluon plasma; Quarkonium suppression
English
28-ago-2022
2022
835
137397
none
Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Dragicevic, M., Ero, J., et al. (2022). Nuclear modification of Y states in pPb collisions at sNN=5.02TeV. PHYSICS LETTERS. SECTION B, 835 [10.1016/j.physletb.2022.137397].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/438281
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