Nuclear modification of Y states in pPb collisions at √sNN = 5.02 TeV
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Production cross sections of Υ(1S), Υ(2S), and Υ(3S) states decaying into μ+μ− in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at √sNN = 5.02 TeV. 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 Υ(1S) is found to be RpPb(Υ(1S)) = 0.806±0.024 (stat)±0.059 (syst). Similar results for the excited states indicate a sequential
suppression pattern, such that RpPb(Υ(1S)) > RpPb(Υ(2S)) > RpPb(Υ(3S)). The suppression of all states is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum pΥT and
center-of-mass rapidity yΥCM of the individual Υ state in the studied range p
ΥT < 30 GeV/c and |yΥCM| <1.93. 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.
suppression pattern, such that RpPb(Υ(1S)) > RpPb(Υ(2S)) > RpPb(Υ(3S)). The suppression of all states is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum pΥT and
center-of-mass rapidity yΥCM of the individual Υ state in the studied range p
ΥT < 30 GeV/c and |yΥCM| <1.93. 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.
Date Issued
2022-12-10
Date Acceptance
2022-08-22
Citation
Physics Letters B, 2022, 835
ISSN
0370-2693
Publisher
Elsevier BV
Journal / Book Title
Physics Letters B
Volume
835
Copyright Statement
© 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
(http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
License URL
Identifier
https://www.sciencedirect.com/science/article/pii/S0370269322005317?via%3Dihub
Subjects
hep-ex
hep-ex
nucl-ex
Nuclear & Particles Physics
0105 Mathematical Physics
0201 Astronomical and Space Sciences
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
Publication Status
Published
Article Number
ARTN 137397
Date Publish Online
2022-08-28