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Measurement of hard double-parton interactions in W(→ℓν) + 2-jet events at &#8730;<span style="text-decoration:overline">s</span>=7 TeV​ with the ATLAS detector

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IOP Publishing Ltd. and Deutsche Physikalische Gesellschaft
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Enlighten – Research publications by members of the University of Glasgow http://eprints.gla.ac.uk Aad, G et al. (2013) Measurement of hard double-parton interactions in W(→ℓν) + 2-jet events at √s=7 TeV with the ATLAS detector. New Journal of Physics, 15 (3). 033038. ISSN 1367-2630 Copyright © 2013 The Authors http://eprints.gla.ac.uk/86694/ Deposited on: 11 October 2013 This content has been downloaded from IOPscience. Please scroll down to see the full text. Download details: IP Address: 130.209.6.42 This content was downloaded on 11/10/2013 at 11:38 Please note that terms and conditions apply. Measurement of hard double-parton interactions in W(→ℓ) + 2-jet events at TeV with the ATLAS detector View the table of contents for this issue, or go to the journal homepage for more 2013 New J. Phys. 15 033038 (http://iopscience.iop.org/1367-2630/15/3/033038) Home Search Collections Journals About Contact us My IOPscience Measurement of hard double-parton interactions in W(→ `ν) + 2-jet events at√s = 7TeV with the ATLAS detector The ATLAS Collaboration New Journal of Physics 15 (2013) 033038 (39pp) Received 29 January 2013 Published 25 March 2013 Online at http://www.njp.org/ doi:10.1088/1367-2630/15/3/033038 E-mail: [email protected] Abstract. The production of W bosons in association with two jets in proton–proton collisions at a centre-of-mass energy of √ 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 with the ATLAS detector at the Large Hadron Collider. The fraction of events arising from double-parton interactions, f (D)DP , has been measured through the pT balance between the two jets and amounts to f (D)DP = 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 fo

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