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Observation and studies of double J/psi production at the Tevatron
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2014 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 90, no 11, 111101- p.Article in journal (Refereed) Published
Abstract [en]

We present the observation of doubly produced J/psi mesons with the D0 detector at Fermilab in p (p) over bar collisions at root s = 1.96 TeV. The production cross section for both singly and doubly produced J/psi mesons is measured using a sample with an integrated luminosity of 8.1 fb(-1). For the first time, the double J/psi production cross section is separated into contributions due to single and double parton scatterings. Using these measurements, we determine the effective cross section seff, a parameter characterizing an effective spatial area of the parton-parton interactions and related to the parton spatial density inside the nucleon.

Place, publisher, year, edition, pages
2014. Vol. 90, no 11, 111101- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-241410DOI: 10.1103/PhysRevD.90.111101ISI: 000346048200001OAI: oai:DiVA.org:uu-241410DiVA: diva2:781994
Available from: 2015-01-19 Created: 2015-01-12 Last updated: 2017-12-05Bibliographically approved

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Buszello, Claus P.

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