Exclusive production of $\rho$ meson in gamma-proton collisions: $d\sigma /dt$ and the role of helicity flip processes

Abstract

We calculate the differential cross section $d\sigma /dt$ for the diffractive photoproduction process $\gamma p\to \rho p$ and compare to recent data extracted by the CMS collaboration from ultraperipheral proton-lead collisions. Our model is based on two-gluon exchange in the nonperturbative domain. We take into account both helicity conserving and often neglected helicity-flip amplitudes in the $\gamma \to V$ transition. The letter can contribute at finite $t$. The shape of the differential cross section as well as the role of helicity flip processes is strongly related to the dependence of the unintegrated gluon distribution on transverse momenta in the nonperturbative region.

18 pages, 8 figures

References in corpus (7)

• Parton distributions in the LHC era: MMHT 2014 PDFs
• Transverse-momentum-dependent gluon distribution functions in a spectator model
• Investigating the inclusive transverse spectra in high-energy $pp$ collisions in the context of geometric scaling framework
• Central exclusive production of dijets at hadronic colliders
• Proton hot spots and exclusive vector meson production
• Exclusive processes in $ep$ collisions at the EIC and LHeC: A closer look on the predictions of saturation models
• Photoproductions of dileptons, photons, and light vector mesons in p-p, p-Pb, and Pb-Pb collisions at Large Hadron Collider energies

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