A measurement of the production of a prompt J/ψ meson in association with a W± boson with W± → μν and J/ψ → μ+μ− is presented for J/ψ transverse momenta in the range 8.5–150 GeV and rapidity |yJ/ψ| < 2.1 using ATLAS data recorded in 2012 at the LHC. The data were taken at a proton-proton centre-of-mass energy of s = 8 TeV and correspond to an integrated luminosity of 20.3 fb−1. The ratio of the prompt J/ψ plus W± cross-section to the inclusive W± cross-section is presented as a differential measurement as a function of J/ψ transverse momenta and compared with theoretical predictions using different double-parton-scattering cross-sections. [Figure not available: see fulltext.].

Aaboud, M., Aad, G., Abbott, B., Abbott, D.C., Abdinov, O., Abeloos, B., et al. (2020). Measurement of J/ψ production in association with a W ± boson with pp data at 8 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2020(1) [10.1007/JHEP01(2020)095].

Measurement of J/ψ production in association with a W ± boson with pp data at 8 TeV

Ceradini F.;Di Micco B.;Di Nardo R.;Orestano D.;Petrucci F.;Rossi E.;