Evidence for Simultaneous Production of J/ψ and ϒ Mesons

Authors

V. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Daniel R. Claes, University of Nebraska-LincolnFollow
Kayle DeVaughan, University of Nebraska-Lincoln
Aaron Dominguez, University of Nebraska-LincolnFollow
M. Eads, University of Nebraska-Lincoln, Lincoln,Follow
Ioannis Katsanos, University of Nebraska-LincolnFollow
Sudhir Malik, University of Nebraska-LincolnFollow
Gregory Snow, University of Nebraska-LincolnFollow
M. Voutilainen, University of Nebraska-Lincoln
D0 Collaboration

Date of this Version

2016

Citation

PRL 116, 082002 (2016)

Comments

Published by the American Physical Society

DOI: 10.1103/PhysRevLett.116.082002

Abstract

We report evidence for the simultaneous production of J/ψ and ϒ mesons in 8.1 fb⁻¹ of data collected at [?] = 1.96 TeV by the D0 experiment at the Fermilab pp Tevatron Collider. Events with these characteristics are expected to be produced predominantly by gluon-gluon interactions. In this analysis, we extract the effective cross section characterizing the initial parton spatial distribution, σ_eff = 2.2 ± 0.7(stat) ± 0.9(syst) mb.