Research Papers in Physics and Astronomy

 

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 fb1 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, σeff = 2.2 ± 0.7(stat) ± 0.9(syst) mb.

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