Charmonium production in pPb and PbPb collisions at 5.02 TeV with CMS

Andre Govinda Stahl Leiton (1)

1 LIMSI - Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur

Charmonium states, such as $J/\psi$ and $\psi\left(2S\right)$ mesons, are excellent probes of the Quark-Gluon Plasma (QGP). The understanding of charmonium production in PbPb collisions requires the inclusion of many phenomena, such as dissociation in the QGP and statistical recombination, on top of cold nuclear matter effects (modifications of nPDFs, initial-state energy loss, nuclear break-up). Measurements of charmonium production in pPb collisions are crucial in order to disentangle the QGP-related effects from cold nuclear matter effects. In these proceedings, final results on the ratio of $\psi\left(2S\right)$ meson to $J/\psi$ meson yields in PbPb collisions normalized to pp collisions at $\sqrt{s_{NN}}=5.02$ TeV, are reported. In addition, final prompt and nonprompt $J/\psi$ meson results in pPb collisions at 5.02 TeV are also shown, using the 2015 pp data taken at the same energy. At last, final results are reported regarding prompt $\psi\left(2S\right)$ meson production in pPb collisions at 5.02 TeV, as a function of rapidity.

Mots clés: talk: Venice 2017/07/05; p nucleus: interaction; lead; charmonium: hadroproduction; nuclear matter: effect; meson: production; nucleus: fragmentation; quark gluon: plasma; psi mesons: yield; p p: scattering; psi(3685): yield; J/psi(3100): yield; yield: ratio; CMS; recombination; initial state; dissociation; statistical; energy loss; rapidity dependence; experimental results; 5020 GeV-cms/nucleon

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique Nucléaire Expérimentale [nucl-ex]

Andre Govinda Stahl Leiton. Charmonium production in pPb and PbPb collisions at 5.02 TeV with CMS. 2017 European Physical Society Conference on High Energy Physics, Jul 2017, Venice, Italy. pp.196, ⟨10.22323/1.314.0196⟩. ⟨hal-02065785⟩