Semiexclusive production of vector mesons in proton-proton collisions with electromagnetic dissociation of protons

Anna Cisek,Wolfgang Schäfer,Antoni Szczurek,A Wrońska,W Przygoda,A Magiera

doi:10.1051/epjconf/201919905010

Abstract

We discuss the semiexclusive production of vector mesons in protonproton collisions with electromagnetic dissociation of one of the protons. Several differential distribution in missing mass (MX), or single-particle variables related exclusively to the produced vector meson are calculated for pp center-of-mass energies 7 and 13 TeV. The cross sections and some differential distributions are compared to their counterparts for purely exclusive reaction $pp \to pV{\rm{ }}p$. For electromagnetic dissociation the important property is that the $p\gamma^{\bigstar} \to Xp$ transitions are given by the electromagnetic structure function of proton. In our calculations we use different parametrizations of the structure function and discuss how it is constrained by the data on virtual photoabsorption on a proton.

Highlights

Exclusive vector meson production, especially of heavier quarkonia like J/ψ or Υ in γp → V p collisions is in principle subjected to pQCD methods
We shall show some differential distributions associated with electromagnetic excitation of the final state proton
In the left panel we present results for φ meson, in the middle panel for J/ψ meson and in the right panel for Υ meson

Summary

Introduction

Especially of heavier quarkonia like J/ψ or Υ in γp → V p collisions is in principle subjected to pQCD methods. The energy dependence for the diffractive photoproduction of vector mesons was measured at the HERA accelerator. The energy dependence of the diffractive cross section is driven by the gluon distribution.

Results

Conclusion