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.
Titolo: | Multiplicity dependence of inclusive J/ψ production at midrapidity in pp collisions at √s = 13 TeV |
Autori: | |
Data di pubblicazione: | 2020 |
Stato di pubblicazione: | Pubblicato |
Rivista: | |
Abstract: | 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. |
Handle: | http://hdl.handle.net/11368/2974683 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.physletb.2020.135758 |
Appare nelle tipologie: | 1.1 Articolo in Rivista |
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