Abstract
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the differential cross section, mean transverse momentum, mean transverse momentum squared of inclusive , and cross section ratio of to at forward rapidity in collisions at via the dimuon decay channel. Comparison is made to inclusive cross sections measured at and 2.76–13 TeV. The result is also compared to leading-order nonrelativistic QCD calculations coupled to a color-glass-condensate description of the low- gluons in the proton at low transverse momentum () and to next-to-leading order nonrelativistic QCD calculations for the rest of the range. These calculations overestimate the data at low . While consistent with the data within uncertainties above , the calculations are systematically below the data. The total cross section times the branching ratio is BR .
4 More- Received 1 January 2020
- Accepted 19 February 2020
DOI:https://doi.org/10.1103/PhysRevD.101.052006
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society