# 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!

## Enhancement of $\psi(2S)$ in p-Pb collision at LHC as an indication of QGP formation

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

Poster Quarkonia

### Speaker

Mr Captain R. Singh (Birla Institute of Technology and Science, Pilani)

### Description

Asymmetric p+A collisions serve as a baseline for the understanding of the nucleus-nucleus collisions. Traditionally, they have been employed to observe the differences between the elementary and heavy-ion collision experiments. The heavy flavor production in p+A collision is well explained by cold nuclear matter effects in earlier experiments such as SPS and RHIC. The recent observation of heavy quarkonium production in p+Pb collision at CERN LHC indicates the possible existence of Quark-Gluon Plasma (QGP) in such small system. In this work, we performed pNRQCD calculation to calculate $\psi(2S)$ enhancement and also incorporated other hot nuclear matter effects to explain the yields of different charmonium states in p+Pb collisions at LHC energy,$\sqrt{s_{NN}}\; = \;5.02\; TeV$. We proposed here that the relative enhancement of $\psi(2S)$ vis a vis $J/\psi$, especially at high transverse momentum ($p_{T}$), is a possible clean probe for indicating QGP formation in such a small systems at LHC energies. The $\psi(2S)$ suppression effects observed at ALICE, is also qualitatively explained in the present work.

Collaboration N/A Presenter name already specified Theory

### Primary authors

Dr S. Ganesh (Birla Institute of Technology and Science, Pilani) Mr Captain R. Singh (Birla Institute of Technology and Science, Pilani) Dr M. Mishra (Birla Institute of Technology and Science, Pilani)