$J/\psi$ photo-production in Pb-Pb peripheral collisions at $\sqrt{s_{\rm NN}}$ = 5 TeV

TL;DR

This paper reports on the measurement of $J/\psi$ photo-production at low transverse momentum in peripheral Pb-Pb collisions at 5 TeV, providing new data that enhances understanding of photon-induced processes in heavy-ion collisions.

Contribution

It presents the first detailed measurement of $J/\psi$ photo-production in peripheral heavy-ion collisions at the LHC, improving upon previous experimental results.

Findings

Results significantly improve previous measurements.

Data are compared to the latest theoretical predictions.

Findings support or challenge existing models of photon-induced interactions.

Abstract

The photo-production of $J/\psi$ mesons at low transverse momentum is studied in peripheral lead-lead collisions collected by the LHCb experiment at a centre-of-mass energy per nucleon pair of 5 TeV, corresponding to an integrated luminosity of 210 $\rm{\mu b}^{-1}$. The $J/\psi$ candidates are reconstructed through the prompt decay into two muons of opposite charge in the rapidity region of $2.0<y<4.5$. The results significantly improve previous measurements and are compared to the latest theoretical prediction.