PHENIICS Doctoral School Days

Charmonium production in pp and PbPb collisions with the CMS experiment

May 11, 2016, 2:30 PM

1h

Auditorium Pierre Lehmann (Laboratoire de l'Accélérateur Linéaire (LAL))

Board: 63

Poster Particle Physics Poster session

Speaker

Mr Andre Govinda Stahl (LLR)

Description

The measurement of Psi(2S) meson yield in PbPb collisions compared to the J/psi meson is used to study the modifications of the charmonium production in PbPb due to effects like melting in the quark gluon plasma and statistical recombination. Previous results reported by the CMS Collaboration using pp and PbPb data at sqrt(s_NN) = 2.76 TeV, have shown that the Psi(2S) meson is more suppressed than the J/psi at midrapidity and high pt (|y|<1.6. pt>6.5), but slightly less suppressed at forward rapidity and intermediate pt (1.6<|y|<2.4, pt>3). A new analysis is currently been performed using the pp and PbPb data collected at sqrt(s_NN) = 5.02 TeV by the CMS Collaboration, and a brief summary of the analysis will be presented during the Doctoral School Days (no results will be shown since it is an ongoing analysis).