An observation of electroweak W+-Z production in association with two jets in proton–proton collisions is presented. The data collected by the ATLAS detector at the Large Hadron Collider in 2015 and 2016 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 36.1 fb-1. Events containing three identified leptons, either electrons or muons, and two jets are selected. The electroweak production of W+-Z bosons in association with two jets is measured with an observed significance of 5.3 standard deviations. A fiducial cross-section for electroweak production including interference effects and for a single leptonic decay mode is measured to be σWZjj−EW=0.57 +0.14−0.13(stat.) +0.07−0.06(syst.). Total and differential fiducial cross-sections of the sum of electroweak and strong productions for several kinematic observables are also measured.
Observation of electroweak W±Z boson pair production in association with two jets in pp collisions at sqrt(s) = 13 TeV with the ATLAS detector
G Chiodini;E Gorini;F Gravili;L Longo;A Mirto;M Reale;E Schioppa;S Spagnolo;A Ventura;
2019-01-01
Abstract
An observation of electroweak W+-Z production in association with two jets in proton–proton collisions is presented. The data collected by the ATLAS detector at the Large Hadron Collider in 2015 and 2016 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 36.1 fb-1. Events containing three identified leptons, either electrons or muons, and two jets are selected. The electroweak production of W+-Z bosons in association with two jets is measured with an observed significance of 5.3 standard deviations. A fiducial cross-section for electroweak production including interference effects and for a single leptonic decay mode is measured to be σWZjj−EW=0.57 +0.14−0.13(stat.) +0.07−0.06(syst.). Total and differential fiducial cross-sections of the sum of electroweak and strong productions for several kinematic observables are also measured.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
