The exclusive photoproduction of Υ (nS) meson states from protons, γp→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 sNN=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-1. Differential cross sections as functions of the Υ (nS) transverse momentum squared pT2, and rapidity y, 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<826GeV. The data are compared to theoretical predictions based on perturbative quantum chromodynamics and to previous measurements.

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2019). Measurement of exclusive Υ photoproduction from protons in p Pb collisions at √sNN=5.02TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 79(3) [10.1140/epjc/s10052-019-6774-8].

Measurement of exclusive Υ photoproduction from protons in p Pb collisions at √sNN=5.02TeV

Benaglia A.;Beschi A.;Brianza L.;Brivio F.;Ciriolo V.;Dinardo M. E.;Fiorendi S.;Ghezzi A.;Govoni P.;Malberti M.;Manzoni R. A.;Moroni L.;Paganoni M.;Pigazzini S.;Ragazzi S.;de Fatis T. T.;Lucchini M. T.;Gerosa R.;Massironi A.;De Guio F.;
2019

Abstract

The exclusive photoproduction of Υ (nS) meson states from protons, γp→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 sNN=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-1. Differential cross sections as functions of the Υ (nS) transverse momentum squared pT2, and rapidity y, 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<826GeV. The data are compared to theoretical predictions based on perturbative quantum chromodynamics and to previous measurements.
Articolo in rivista - Articolo scientifico
CMS; photoproduction; pPb; UPC; Y;
English
2019
79
3
277
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2019). Measurement of exclusive Υ photoproduction from protons in p Pb collisions at √sNN=5.02TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 79(3) [10.1140/epjc/s10052-019-6774-8].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/319204
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