Paper
Complete Study of Hadroproduction of a $Υ$ Meson Associated with a Prompt $J/ψ$
Authors
Abstract
We present the first complete study of and prompt production from single-parton scattering, including the complete color-singlet contribution, the electroweak contribution, the complete nonrelativistic S-wave and P-wave color-octet contribution as well as the feeddown contribution. Our study was motivated by the recent evidence reported by D0 Collaboration of prompt and simultaneous production at the Tevatron. With our complete evaluation, we are able to refine the determination of the double parton scattering contribution made by D0 Collaboration. We find that the effective cross section characterizing the importance of double-parton scatterings is mb at confidence level from the D0 measurement.