Multiplicity dependence of inclusive J/ψ production at midrapidity in pp collisions at √s = 13 TeV
ALICE Collaboration. (2020). Multiplicity dependence of inclusive J/ψ production at midrapidity in pp collisions at √s = 13 TeV. Physics Letters B, 810, Article 135758. https://doi.org/10.1016/j.physletb.2020.135758
Published inPhysics Letters B
DisciplineFysiikkaYdin- ja kiihdytinfysiikan huippuyksikköPhysicsCentre of Excellence in Nuclear and Accelerator Based Physics
© 2020 European Organization for Nuclear Research. Published by Elsevier B.V. Funded by SCOAP3.
Measurements of the inclusive J/ψ yield as a function of charged-particle pseudorapidity density dNch/dη in pp collisions at √s=13 TeV with ALICE at the LHC are reported. The J/ψ meson yield is measured at midrapidity (|y|<0.9) in the dielectron channel, for events selected based on the charged-particle multiplicity at midrapidity (|η|<1) and at forward rapidity (−3.7<−1.7 and 2.8<5.1); both observables are normalized to their corresponding averages in minimum bias events. The increase of the normalized J/ψ yield with normalized dNch/dη is significantly stronger than linear and dependent on the transverse momentum. The data are compared to theoretical predictions, which describe the observed trends well, albeit not always quantitatively.