Inclusive production in p–Pb collisions with ALICE

Arnaldi, R. and Abelev, B. and Adam, J. and Adamová, D. and Aggarwal, M. M. and Aglieri, Rinella G. and Agnello, M. and Agostinelli, A. and Agrawal, N. and Ahammed, Z. and Ahmad, N. and Ahmed, I. and Ahn, S. U. and Ahn, S. A. and Aimo, I. and Aiola, S. and Ajaz, M. and Akindinov, A. and Alam, S. N. and Aleksandrov, D. and Alessandro, B. and Alexandre, D. and Alici, A. and Alkin, A. and Alme, J. and Alt, T. and Altinpinar, S. and Altsybeev, I. and Alves, Garcia Prado C. and Andrei, C. and Barnaföldi, Gergely Gábor and Bencédi, Gyula and Berényi, Dániel and Boldizsár, László and Dénes, Ervin and Hamar, Gergő and Kiss, Gábor and Varga-Kőfaragó, Mónika and Lévai, Péter and Oláh, László and Pochybova, Sona (2014) Inclusive production in p–Pb collisions with ALICE. NUCLEAR PHYSICS A, 931. pp. 628-632. ISSN 0375-9474

Preview

Text 1407.7451.pdf Available under License Creative Commons Attribution. Download (256kB) | Preview

Abstract

The ALICE Collaboration has studied the inclusive ψ(2S) production in p-Pb collisions at √sNN = 5.02 TeV at the CERN LHC. Measurements are performed, in the μ+μ− decay channel, in a forward (2.03< ycms <3.53) and in a backward (-4.46< ycms <-2.96) centre of mass rapidity ranges, as a function of transverse momentum or event activity. The ψ(2S) production is compared to the J/ψ one through the double ratio [σψ(2S)/σJ/ψ]pPb/[σψ(2S)/σJ/ψ]pp between the cross sections evaluated in p-Pb and pp collisions and by calculating the J/ψ and ψ(2S) nuclear modification factors. Results indicate that the ψ(2S) production is suppressed with respect to pp and, in particular in the backward rapidity region, the suppression is stronger than the J/ψ one. This unexpected difference between the J/ψ and ψ(2S) behaviour, not accounted for by theoretical models based on nuclear parton shadowing and coherent energy loss mechanisms, indicates the presence of sizeable final state effects on the ψ(2S) production.

Actions (login required)

Edit Item