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Evidence for simultaneous production of J/ψ and ϒ Mesons

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  • D0 Collaboration
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Article number082002
<mark>Journal publication date</mark>25/02/2016
<mark>Journal</mark>Physical Review Letters
Issue number8
Volume116
Number of pages8
<mark>State</mark>Published
<mark>Original language</mark>English

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 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, σeff=2.2±0.7(stat)±0.9(syst)  mb.