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Double parton interactions in gamma+3 jet events in p(p)over-bar collisions at root s=1.96 TeV
Univ Michigan, Ann Arbor.ORCID-id: 0000-0002-8913-0981
2010 (engelsk)Inngår i: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 81, nr 5, s. 052012-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We have used a sample of gamma + 3 jets events collected by the D0 experiment with an integrated luminosity of about 1 fb(-1) to determine the fraction of events with double parton scattering (f(DP)) in a single p (p) over bar collision at root s = 1.96 TeV. The DP fraction and effective cross section (sigma(eff)), a process-independent scale parameter related to the parton density inside the nucleon, are measured in three intervals of the second (ordered in p(T)) jet transverse momentum p(T)(jet2) within the range 15 <= p(T)(jet2) <= 30 GeV. In this range, f(DP) varies between 0.23 <= f(DP) <= 0.47, while sigma(eff) has the average value sigma(ave)(eff) = 16.4 +/- 0.3(stat) +/- 2.3(syst) mb.

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2010. Vol. 81, nr 5, s. 052012-
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URN: urn:nbn:se:kth:diva-72062DOI: 10.1103/PhysRevD.81.052012ISI: 000276194200020OAI: oai:DiVA.org:kth-72062DiVA, id: diva2:488802
Forskningsfinansiär
Swedish Research Council
Merknad
QC 20120202Tilgjengelig fra: 2012-02-02 Laget: 2012-01-31 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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