Study of production and cold nuclear matter effects in pPb collisions at s NN √sNN = 5 TeV

Title:	Study of production and cold nuclear matter effects in pPb collisions at s NN √sNN = 5 TeV
Authors:	Artuso, Marina Alessio, Federico Baldini, Wander Aslanides, E. L.
Keywords:	Heavy Ions;Heavy quark production;Particle and resonance production;Quarkonium;Relativistic heavy ion physics
Issue Date:	2014
Publisher:	Journal of High Energy Physics
Citation:	Scopus

URI:	http://link.springer.com/article/10.1007%2FJHEP07%282014%29094 http://repository.vnu.edu.vn/handle/VNU_123/34205

Production of mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy s NN √sNN = 5 TeV is studied with the LHCb detector. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6 nb-1. The mesons of transverse momenta up to 15 GeV/c are reconstructed in the dimuon decay mode. The rapidity coverage in the centre-of-mass system is 1.5 < y < 4.0 (forward region) and -5.0 < y < -2.5 (backward region). The forward-backward production ratio and the nuclear modification factor for (1S) mesons are determined. The data are compatible with the predictions for a suppression of (1S) production with respect to proton-proton collisions in the forward region, and an enhancement in the backward region. The suppression is found to be smaller than in the case of prompt J/ψ mesons. [Figure not available: see fulltext.]