Evidence for Simultaneous Production of J/ψ and ϒ Mesons

Authors

V. M. 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
Ioannis Katsanos, University of Nebraska-LincolnFollow
Sudhir Malik, University of Nebraska-LincolnFollow
Gregory Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

2016

Citation

PHYSICAL REVIEW LETTERS 116, 082002 (2016) (26 FEBRUARY 2016)

Comments

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.

Abstract

We report evidence for the simultaneous production of J/ψ and ϒ mesons in 8.1 fb⁻¹ of data collected at √s = 1.96 TeV by the D0 experiment at the Fermilab p¯p 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.