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Evidence for Simultaneous Production of J/psi and Upsilon Mesons
Dubna Joint Nucl Res Inst, Dubna 141980, Russia..
Univ Oklahoma, Norman, OK 73019 USA..
Tata Inst Fundamental Res, Homi Bhabha Rd, Mumbai 400005, Maharashtra, India..
Univ Illinois, Chicago, IL 60607 USA..
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2016 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 116, no 8, 082002Article in journal (Refereed) PublishedText
Abstract [en]

We report evidence for the simultaneous production of J/psi and Upsilon mesons in 8.1 fb(-1) of data collected at root s = 1.96 TeV by the D0 experiment at the Fermilab p (p) over bar 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, sigma(eff) = 2.2 +/- 0.7(stat) +/- 0.9(syst) mb.

Place, publisher, year, edition, pages
2016. Vol. 116, no 8, 082002
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-282312DOI: 10.1103/PhysRevLett.116.082002ISI: 000370817400008OAI: oai:DiVA.org:uu-282312DiVA: diva2:916856
Swedish Research Council
Available from: 2016-04-05 Created: 2016-04-05 Last updated: 2016-04-05Bibliographically approved

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