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Double parton interactions in photon+3 jet events in p p-bar collisions sqrt{s}=1.96 TeV

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    0347563 - FZÚ 2011 RIV US eng J - Journal Article
    Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš
    Double parton interactions in photon+3 jet events in p p-bar collisions sqrt{s}=1.96 TeV.
    Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 81, č. 5 (2010), 052012/1-052012/15. ISSN 1550-7998
    R&D Projects: GA MŠMT LC527; GA MŠMT LA08047
    Institutional research plan: CEZ:AV0Z10100502
    Keywords : D0 * events * jet
    Subject RIV: BF - Elementary Particles and High Energy Physics
    Impact factor: 4.964, year: 2010
    http://arxiv.org/abs/0912.5104

    We have used a sample of photon+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 ppbar collision at sqrt{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 pT) jet transverse momentum pT_jet2 within the range 15 < pT_jet2 < 30 GeV. In this range, f_DP varies between 0.23 < f_DP < 0.47, while sigma_eff has the average value sigma_eff_ave = 16.4 +- 0.3(stat) +- 2.3(syst) mb.
    Permanent Link: http://hdl.handle.net/11104/0188319

     
     
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