Measurement of hard double-parton interactions in $W(\to l\nu)$+ 2 jet events at $\sqrt{s}$=7 TeV with the ATLAS detector

The ATLAS collaboration
New J.Phys. 15 (2013) 033038, 2013.

Abstract (data abstract)
CERN-LHC. The production of W bosons in association with two jets in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV has been analysed for the presence of double-parton interactions using data corresponding to an integrated luminosity of 36 pb^-1, collected in 2010 with the ATLAS detector at the LHC. The fraction of events arising from double-parton interactions, f_{DP}^{(D)}, has been measured through the momentum balance between the two jets and amounts to f_{DP}^{(D)} = 0.08 +- 0.01 (stat.) +- 0.02 (sys) for jets with transverse momentum pT > 20 GeV and rapidity |y| < 2.8. This corresponds to a measurement of the effective area parameter for hard double-parton interactions of sigma_{eff} = 15 +- 3 (stat.) +5,-3 (sys.) mb. Data points reverse engineered from Figure 9 of paper by Evgeny Slavin.

  • Table 1

    Data from Figure 9A


    Distribution of Delta(jets,normalised), defined in Eq. (11) of the paper as the transverse momentum of the dijet system normalised by...

  • Table 2

    Data from Figure 9B


    Distribution of Delta(jets), defined in Eq. (10) of the paper as the transverse momentum of the dijet system, in the...

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