LHCb results in proton-nucleus collisions at the LHC

International Workshop on Discovery Physics at the LHC

Müller, Katharina^1

Winterthurerstr. 190, Zurich

CH-8057, Switzerland^1

关键词: B-hadron decays;    Centre-of-mass energies;    Integrated luminosity;    Kinematic range;    Lead collisions;    LHC experiments;    Nuclear modification factors;    Proton-nucleus collisions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/623/1/012023/pdf
DOI  :  10.1088/1742-6596/623/1/012023

来源: IOP

【 摘 要 】

The forward acceptance of the LHCb detector allows it to probe proton-ion collision in a unique kinematic range, complementary to the other LHC experiments. The production of J/Ψ and Υ-mesons decaying into two muons is studied at the LHCb experiment in proton-lead collisions at a proton-nucleon centre-of-mass energy sNN= 5 TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6 nb-1. The nuclear modification factor and the forward-backward production ratio are determined for J/Ψ and Υ(1S) mesons. Clear suppression of prompt J/Ψ production is observed with respect to the production in pp collisions at large rapidity, while the suppression of J/Ψ from b-hadron decays is less pronounced. The nuclear modification factor for Υ(1S) mesons in the forward region is found to be similar to those for J/Ψ from b-hadron decays. Furthermore, a first observation of Z bosons in proton-lead collisions is reported.