Počet záznamů: 1

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

  1. 1.
    0347563 - FZU-D 2011 RIV US eng J - Článek v odborném periodiku
    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
    Grant CEP: GA MŠk LC527; GA MŠk LA08047
    Výzkumný záměr: CEZ:AV0Z10100502
    Klíčová slova: D0 * events * jet
    Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
    Impakt faktor: 4.964, rok: 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.
    Trvalý link: http://hdl.handle.net/11104/0188319