Double parton interactions in $\gamma$+3 jet events in $p p^-$ bar collisions $\sqrt{s}=1.96$ TeV.
(2010) Physical review D — Vol. 81 (2010)
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- Abstract
- 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.
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Citations
Tanasijczuk, A. J., D0, & et al. (2010). Double parton interactions in $\gamma$+3 jet events in $p p^-$ bar collisions $\sqrt{s}=1.96$ TeV. Physical review D, 81. https://doi.org/10.1103/PhysRevD.81.052012 (Original work published 2010)