Measurement of exclusive Upsilon photoproduction from protons in pPb collisions at root sNN=5.02 Tev



Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Eroe, J
et al (show 2287 more authors) (2019) Measurement of exclusive Upsilon photoproduction from protons in pPb collisions at root sNN=5.02 Tev. EUROPEAN PHYSICAL JOURNAL C, 79 (3). 277-.

Access the full-text of this item by clicking on the Open Access link.

Abstract

The exclusive photoproduction of Υ ( nS ) meson states from protons, γ p → Υ ( nS ) p (with n = 1 , 2 , 3 ), is studied in ultraperipheral p Pb collisions at a centre-of-mass energy per nucleon pair of s NN = 5.02 TeV . 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 32.6 nb - 1 . Differential cross sections as functions of the Υ ( nS ) transverse momentum squared p T 2 , and rapidity <i>y</i>, are presented. The Υ ( 1 S ) 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 γ p < 826 GeV . The data are compared to theoretical predictions based on perturbative quantum chromodynamics and to previous measurements.

Item Type: Article
Uncontrolled Keywords: CMS, UPC, photoproduction, Y, pPb
Depositing User: Symplectic Admin
Date Deposited: 07 May 2019 10:36
Last Modified: 24 Jan 2024 13:13
DOI: 10.1140/epjc/s10052-019-6774-8
Open Access URL: https://doi.org/10.1140/epjc/s10052-019-6774-8
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3040065