Measurement of exclusive Υ photoproduction from protons in pPb collisions at [radical]s [subscript NN] = 5.02 TeV
Name
Sirunyan2019_Article_MeasurementOfExclusiveMathrmUp.pdf
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981.97 KB
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Checksum (MD5)
0d7a7f88eb4ce3b2bc86f564ab5e30dd
Date Issued
March 2019
Journal
The European Physical Journal C
Publisher
Springer Science and Business Media LLC
Citation
Sirunyan, A.M., Tumasyan, A., Adam, W. et al. Measurement of exclusive Υ photoproduction from protons in pPb collisions at 𝑠NN‾‾‾√=5.02TeV. Eur. Phys. J. C 79, 277 (2019). © CERN for the benefit of the CMS collaboration 2019
Version
Final published version
Abstract
The exclusive photoproduction of Υ(nS) meson states from protons, 𝛾p→Υ(nS)p (with n=1,2,3), is studied in ultraperipheral pPb collisions at a centre-of-mass energy per nucleon pair of [radical] s [subscript NN] =5.02TeV. The measurement is performed using the Υ(nS)→𝜇+𝜇− decay mode, with data collected by the CMS experiment corresponding to an integrated luminosity of 32.6nb[superscript -1] Differential cross sections as functions of the Υ(nS) transverse momentum squared 𝑝[superscript 2]T, and rapidity y, are presented. The Υ(1S) photoproduction cross section is extracted in the rapidity range |𝑦|<2.2, which corresponds to photon–proton centre-of-mass energies in the range 91<𝑊 [subscript 𝛾p] <826GeV. The data are compared to theoretical predictions based on perturbative quantum chromodynamics and to previous measurements.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-019-6774-8
