Measurements of differential cross sections for J/ψ production in p+Pb collisions at sNN=5.02 TeV at the CERN Large Hadron Collider with the ATLAS detector are presented. The data set used corresponds to an integrated luminosity of 28.1 nb-1. The J/ψ mesons are reconstructed in the dimuon decay channel over the transverse momentum range 8<pT<30GeV and over the center-of-mass rapidity range -2.87<y∗<1.94. Prompt J/ψ are separated from J/ψ resulting from b-hadron decays through an analysis of the distance between the J/ψ decay vertex and the event primary vertex. The differential cross section for production of nonprompt J/ψ is compared to a FONLL calculation that does not include nuclear effects. Forward-backward production ratios are presented and compared to theoretical predictions. These results complement previously published results by covering a region of higher transverse momentum and more central rapidity. They thus constrain the kinematic dependence of nuclear modifications of charmonium and b-quark production in p+Pb collisions.
|Titolo:||Measurement of differential J/ψ production cross sections and forward-backward ratios in p + Pb collisions with the ATLAS detector|
|Data di pubblicazione:||2015|
|Citazione:||Aad, G., Ceradini, F., Di Micco, B., Orestano, D., Petrucci, F., Puddu, D., et al. (2015). Measurement of differential J/ψ production cross sections and forward-backward ratios in p + Pb collisions with the ATLAS detector. PHYSICAL REVIEW. C, NUCLEAR PHYSICS, 92(3).|
|Appare nelle tipologie:||1.1 Articolo in rivista|