The Exclusive Photoproduction of Υ(1S,2S,3S) in pp and pA Collisions at LHC Energies

Maria Beatriz Gay Ducati,Fabio Kopp

doi:10.1142/s2010194517600576

Abstract

We presented the exclusive photoproduction of Upsilon(1S,2S,3S) in pp and pA reactions at the LHC energies for Ultra Peripheral Collisions(UPC). It was calculated in the dipole formalism, with the dipoles models: GBW, CGC and b-CGC. The dipole formalism is characterised by a saturation effect, e.g, the mimic gluon distribution becomes saturated at low-x. This approach has shown a good agreement with the experimental data since HERA and with recent data released by LHCb for processes involving [Formula: see text], [Formula: see text], [Formula: see text] for UPC in pp.

Highlights

The exclusive photoproduction of vector meson Υ(1S,2S,3S) in pp and pA at the LHC energies for Ultra Peripheral Collisions (UPC), is calculated using the dipole formalism for different dipoles models[1]: GBW, CGC and b-CGC
The rapidity distribution takes into account the equivalent photon flux and the cross section which has the meson wave function and the photon wave function and the dipole cross section
It has shown that the ratio Υ(2S) is 5.83 times smaller than Υ(1S) and Υ(3S) is 11.66 times smaller thant Υ(1S), both for the b-CGC-old model at Y=0

Summary

Introduction

The exclusive photoproduction of vector meson Υ(1S,2S,3S) in pp and pA at the LHC energies for Ultra Peripheral Collisions (UPC), is calculated using the dipole formalism for different dipoles models[1]: GBW, CGC and b-CGC. 1. Introduction The exclusive photoproduction of vector meson Υ(1S,2S,3S) in pp and pA at the LHC energies for Ultra Peripheral Collisions (UPC), is calculated using the dipole formalism for different dipoles models[1]: GBW, CGC and b-CGC. It is shown the differential cross section in rapidity and the total cross-section for each model at the centre-of-mass energy of 8.2 TeV (pA) and 14 TeV (pp).

Results

Conclusion