Observation of Prompt J/ψ Meson Elliptic Flow in High-Multiplicity pPb Collisions at √sNN = 8.16 TeV

Physics Letters B 2019
Viesturs Veckalns, et al 100

A measurement of the elliptic flow (v 2 ) of prompt J/ψ mesons in high-multiplicity pPb collisions is reported using data collected by the CMS experiment at a nucleon-nucleon center-of-mass energy s NN =8.16TeV. Prompt J/ψ mesons decaying into two muons are reconstructed in the rapidity region in the nucleon-nucleon center-of-mass frame (y cm ), corresponding to either −2.86<y cm <−1.86 or 0.94<y cm <1.94. The average v 2 result from the two rapidity ranges is reported over the transverse momentum (p T ) range from 0.2 to 10 GeV. Positive v 2 values are observed for the prompt J/ψ meson, as extracted from long-range two-particle correlations with charged hadrons, for 2<p T <8 GeV. The prompt J/ψ results are compared with previous CMS measurements of elliptic flow for open charm mesons (D 0 ) and strange hadrons. From these measurements, constraints can be obtained on the collective dynamics of charm quarks produced in high-multiplicity events arising from small systems.

Keywords
CMS, Correlation, Flow, Heavy flavor, Heavy-ion physics, pPb
DOI
10.1016/j.physletb.2019.02.018
Hyperlink
https://www.sciencedirect.com/science/article/pii/S0370269319301133?via%3Dihub

Veckalns, V., 100, e. Observation of Prompt J/ψ Meson Elliptic Flow in High-Multiplicity pPb Collisions at √sNN = 8.16 TeV. Physics Letters B, 2019, Vol. 791, pp.172-194. ISSN 0370-2693. Available from: doi:10.1016/j.physletb.2019.02.018

Publication language
English (en)