# Quark Matter 2018

May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Measurement of exclusive Upsilon photoproduction off protons in pPb collisions at sqrt(s_NN) = 5.02 TeV with CMS

May 14, 2018, 4:30 PM
20m
Sala Volpi, 1st Floor (Palazzo del Casinò)

### Sala Volpi, 1st Floor

#### Palazzo del Casinò

Parallel Talk Initial state physics and approach to equilibrium

### Speaker

Ruchi Chudasama (Bhabha Atomic Research Centre (IN))

### Description

Exclusive photoproduction of Upsilon(nS) meson states off protons is measured in ultraperipheral pPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The measurement is carried out in the $\Upsilon (nS)\to\mu^+\mu^-$ decay modes, with data collected by the CMS experiment corresponding to an integrated luminosity of $32.6$~nb$^{-1}$. Differential cross sections, as a function of the $\Upsilon$(nS) transverse momentum squared $p_{T}^2$, and rapidity $y$, are presented. The $\Upsilon$(1S) photoproduction cross section is extracted as a function of the photon-proton center-of-mass energy over the $91 < W_{\gamma p}<826$~GeV range. The data are compared to theoretical perturbative quantum chromodynamics predictions and to previous measurements.

Centralised submission by Collaboration Presenter name already specified CMS Experiment