Prompt and non-prompt J/psi production and nuclear modification at mid-rapidity in p-Pb collisions at root s(NN)=5.02 TeV
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B. and Zinovjev, G. and Zmeskal, J. and Zou, S. and ALICE Collaboration... Show more Show less
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Abstract
A measurement of beauty hadron production at mid-rapidity in proton-lead
collisions at a nucleon-nucleon centre-of-mass energy root s(NN) = 5.02
TeV is presented. The semi-inclusive decay channel of beauty hadrons
into J/psi is considered, where the J/psi mesons are reconstructed in
the dielectron decay channel at mid-rapidity down to transverse momenta
of 1.3 GeV/c. The bb production cross section at mid-rapidity, d
sigma(bb)/dy, and the total cross section extrapolated over full phase
space, ssigma(bb), are obtained. This measurement is combined with
results on inclusive J/psi production to determine the prompt J/psi
cross sections. The results in p-Pb collisions are then scaled to
expectations from pp collisions at the same centre-of-mass energy to
derive the nuclear modification factor R-pPb, and compared to models to
study possible nuclear modifications of the production induced by cold
nuclear matter effects. RpPb is found to be smaller than unity at low pT
for both J/psi coming from beauty hadron decays and prompt J/psi.... Show more Show less