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Measurement of W+W− production in association with one jet in proton–proton collisions at s=8TeV with the ATLAS detector
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0001-6945-1916
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
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Rekke forfattare: 28552016 (engelsk)Inngår i: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 763, s. 114-133Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The production of W boson pairs in association with one jet in pp collisions at s=8 TeV is studied using data corresponding to an integrated luminosity of 20.3 fb−1 collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The cross section is measured in a fiducial phase-space region defined by the presence of exactly one electron and one muon, missing transverse momentum and exactly one jet with a transverse momentum above 25 GeV and a pseudorapidity of |η|<4.5. The leptons are required to have opposite electric charge and to pass transverse momentum and pseudorapidity requirements. The fiducial cross section is found to be σWW fid,1-jet=136±6(stat)±14(syst)±3(lumi) fb. In combination with a previous measurement restricted to leptonic final states with no associated jets, the fiducial cross section of WW production with zero or one jet is measured to be σWW fid,≤1-jet=511±9(stat)±26(syst)±10(lumi) fb. The ratio of fiducial cross sections in final states with one and zero jets is determined to be 0.36±0.05. Finally, a total cross section extrapolated from the fiducial measurement of WW production with zero or one associated jet is reported. The measurements are compared to theoretical predictions and found in good agreement.

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Elsevier, 2016. Vol. 763, s. 114-133
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URN: urn:nbn:se:kth:diva-203932DOI: 10.1016/j.physletb.2016.10.014ISI: 000390126600017Scopus ID: 2-s2.0-85006626464OAI: oai:DiVA.org:kth-203932DiVA, id: diva2:1084265
Forskningsfinansiär
EU, European Research CouncilEU, FP7, Seventh Framework ProgrammeSwedish Research Council
Merknad

QC 20170324

Tilgjengelig fra: 2017-03-24 Laget: 2017-03-24 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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Kastanas, Konstatinos A.Lund-Jensen, BengtSidebo, P. EdvinStrandberg, Jonas

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