Measurement of exclusive rho(770)(0) photoproduction in ultraperipheral pPb collisions at root s(NN)=5.02 TeV

• Main Authors: Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Ambrogi, Federico, Asilar, Ece, Md. Ali, Mohd. Adli
• Format: Article
• Language: English; English; English
• Published: Springer New York LLC 2019
• Subjects: Q Science (General); QC Physics
• Online Access: http://irep.iium.edu.my/79911/1/79911_Measurement%20of%20exclusive%20rho%28770%29%280%29%20photoproduction_article.pdf; http://irep.iium.edu.my/79911/2/79911_Measurement%20of%20exclusive%20rho%28770%29%280%29%20photoproduction_scopus.pdf; http://irep.iium.edu.my/79911/3/79911_Measurement%20of%20exclusive%20rho%28770%29%280%29%20photoproduction_wos.pdf; http://irep.iium.edu.my/79911/; https://link.springer.com/content/pdf/10.1140/epjc/s10052-019-7202-9.pdf

Exclusive ρ(770) 0 photoproduction is measured for the first time in ultraperipheral pPb collisions at √s NN = 5.02 TeV with the CMS detector. The cross section σ (γp → ρ(770) 0 p) is 11.0 ± 1.4 (stat) ± 1.0 (syst) μb at �Wγ p � = 92.6 GeV for photon–proton centre-of-mass energies Wγ p between 29 and 213 GeV. The differential cross section dσ/d|t| is measured in the interval 0.025 < |t| < 1 GeV2 as a function of Wγ p , where t 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 (γp → 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 Wγ p dependence of the exponential slope of the differential cross section dσ/d|t| is also measured