Study of double parton scattering using W+2-jet events in proton-proton collisions at root s=7 TeV

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doi:10.1007/JHEP03(2014)032

Double parton scattering is investigated in proton-proton collisions at = 7 TeV where the final state includes a W boson, which decays into a muon and a neutrino, and two jets. The data sample corresponds to an integrated luminosity of 5 fb(-1), collected with the CMS detector at the LHC. Observables sensitive to double parton scattering are investigated after being corrected for detector effects and selection efficiencies. The fraction of W + 2-jet events due to double parton scattering is measured to be 0.055 +/- 0.002 (stat.) +/- 0.014 (syst.). The effective cross section, sigma (eff), characterizing the effective transverse area of hard partonic interactions in collisions between protons is measured to be 20.7 +/- 0.8(stat.) +/- 6.6(syst.)mb.

Study of double parton scattering using W+2-jet events in proton-proton collisions at root s=7 TeV / Chatrchyan, S., Khachatryan, V., Sirunyan, A.m., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Ero, J., Fabjan, C., Friedl, M., Fruhwirth, R., Ghete, V.m., Hartl, C., Hormann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Knunz, V., Krammer, M., Kratschmer, I., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 3(2014). [10.1007/JHEP03(2014)032]