Measurement of exclusive ρ(770)<SUP>0</SUP> photoproduction in ultraperipheral pPb collisions at √s<sub>NN</sub>=5.02 TeV



Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Dragicevic, M, Eroe, J, Del Valle, A Escalante
et al (show 2254 more authors) (2019) Measurement of exclusive ρ(770)<SUP>0</SUP> photoproduction in ultraperipheral pPb collisions at √s<sub>NN</sub>=5.02 TeV. EUROPEAN PHYSICAL JOURNAL C, 79 (8). 702-.

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Abstract

Exclusive ρ 770 0 photoproduction is measured for the first time in ultraperipheral pPb collisions at s NN = 5.02 Te with the CMS detector. The cross section σ ( γ p → ρ 770 0 p ) is 11.0 ± 1.4 (stat) ± 1.0 (syst) μ b at ⟨ W γ p ⟩ = 92.6 Ge for photon-proton centre-of-mass energies W γ p between 29 and 213 Ge . The differential cross section d σ / d | t | is measured in the interval 0.025 < | t | < 1 Ge 2 as a function of W γ p , where <i>t</i> is the squared four-momentum transfer at the proton vertex. The results are compared with previous measurements and theoretical predictions. The measured cross section σ ( γ p → ρ 770 0 p ) has a power-law dependence on the photon-proton centre-of-mass, consistent with electron-proton collision measurements performed at HERA. The W γ p dependence of the exponential slope of the differential cross section d σ / d | t | is also measured.

Item Type: Article
Uncontrolled Keywords: CMS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 30 Sep 2019 09:25
Last Modified: 24 Jan 2024 15:06
DOI: 10.1140/epjc/s10052-019-7202-9
Open Access URL: https://doi.org/10.1140/epjc/s10052-019-7202-9
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3056420