St. Petersburg Polytechnic University Journal: Physics and Mathematics Научно-технические ведомости СПбГПУ. Физико-математические науки 2304-9782, 2618-8686, 2405-7223 15 Background processes while monitoring coherentJ/ψ-mesons photoproduction events in ultraperipheral proton-proton collisions Фоновые процессы при регистрации событий когерентного фоторождения J/ψ-мезонов в ультрапериферических столкновениях протонов 0000-0003-0309-5917 Berdnikov Yaroslav berdnikov@spbstu.ru Rebyakova Victoria victoria.rebyakova@gmail.com Spirin Denis ssdenis@mail.ru Peter the Great St. Petersburg Polytechnic University 10 12 2013 4 182 1 117 122

The contribution of two main background effects to the cross-section value of coherent J/ψ-meson photoproduction in ultraperipheral proton-proton collisions at Large Hadron Collider has been evaluated.

 ultraperipheral collisions photoproduction J/Ψ-meson