Double parton interactions in $\gamma$+3 jet events in $p p^-$ bar collisions $\sqrt{s}=1.96$ TeV. - INSPIRE

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Double parton interactions in $\gamma$ +3 jet events in $p p^-$ bar collisions $\sqrt{s}=1.96$ TeV.

D0

Collaboration

Dec, 2009

15 pages

Published in:

Phys.Rev.D 81 (2010) 052012

e-Print:

0912.5104 [hep-ex]

DOI:

10.1103/PhysRevD.81.052012

Report number:

FERMILAB-PUB-09-644-E

Experiments:

FNAL-E-0823

View in:

reference search281 citations

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Abstract: (arXiv)

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.

Note:

15 pages, 13 figures

13.87.Ce
13.85.Qk
12.38.Qk
14.20.Dh
photon: hadroproduction
jet: associated production
final state: (3jet)
hard scattering
jet: transverse momentum
parton: multiple scattering

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