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!

Inclusive Psi(2S) Suppression in p-Pb collisions with ALICE at the LHC

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

First floor and third floor

Palazzo del Casinò

Poster Quarkonia Poster Session


Ms Jhuma Ghosh (Saha Institute of Nuclear Physics (IN))


Quarkonia are produced in the initial hard scatterings and are useful probes to study the microscopic properties of the matter produced in the ultra relativistic heavy-ion collisions. The experimental results show that in nucleus-nucleus collisions, the charmonium yields are modified compared to the expectations based on the yields measured in proton proton interactions, scaled by the number of binary collisions. In proton-nucleus collisions this yield modification is due to the so-called Cold Nuclear Matter (CNM) effects such as shadowing, gluon saturation, parton energy loss, comover absorption. This information can be obtained from p-Pb collisions.

At LHC energies ($\sqrt{s_{\rm{NN}}}$ = 5.02 and 8.16 TeV), ALICE has observed a modification of the J/$\rm{\psi}$ yields in p-Pb collisions which can be understood assuming shadowing to be the dominant contribution. On the other hand, the $\rm{\psi}$(2S) was found to have a similar suppression as the J/$\rm{\psi}$ at forward rapidity, but it shows a much stronger suppression in the backward rapidity region. So, this behavior cannot be explained by the shadowing or energy loss only unlike J/$\rm{\psi}$. Final state mechanisms, as the comover absorption, should be playing a role in this region.

ALICE results on the measurement of $\rm{\psi}$(2S) yields and nuclear modification factor as a function of transverse momentum, rapidity and collision centrality in p-Pb $\sqrt{s_{\rm{NN}}}$ = 8.16 TeV collisions will be presented in the poster.

Centralised submission by Collaboration Presenter name already specified
Content type Experiment
Collaboration ALICE

Primary author

Ms Jhuma Ghosh (Saha Institute of Nuclear Physics (IN))

Presentation materials