2013/08/31 by LHCb collaboration, R. Aaij, B. Adeva +658 · 1 citation
Physics and Astronomy · #Detector #High-Energy Particle Collisions Research #Luminosity #Meson #Nuclear matter #Particle physics theoretical and experimental studies #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quark–gluon plasma #Rapidity #hep-ex #nucl-ex
paper · pdf · doi:10.1007/jhep02(2014)072
published as JHEP 02 (2014) 072 · 26 pages, 7 figures; 7 tables, Published in JHEP
openalex publication_date 2014/02/01 · arxiv created 2014/03/25 · arxiv updated 2016/03/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The production of J/ mesons with rapidity 1.5 < y < 4.0 or -5.0 < y < -2.5 and transverse momentum p T < 14 GeV/c is studied with the LHCb detector in proton-lead collisions at a nucleon-nucleon centre-of-mass energy s N N = 5 TeV. The J/ mesons are reconstructed using the dimuon decay mode. The analysis is based on a data sample corresponding to an integrated luminosity of about 1.6 nb -1 . For the first time the nuclear modification factor and forward-backward production ratio are determined separately for prompt J/ mesons and J/ from b-hadron decays. Clear suppression of prompt J/ production with respect to proton-proton collisions at large rapidity is observed, while the production of J/ from b-hadron decays is less suppressed. These results show good agreement with available theoretical predictions. The measurement shows that cold nuclear matter effects are important for interpretations of the related quark-gluon plasma signatures in heavy-ion collisions.