This Letter reports the observation of WWW production and a measurement of its cross section using 139 fb−1 of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Events with two same-sign leptons (electrons or muons) and at least two jets, as well as events with three charged leptons, are selected. A multivariate technique is then used to discriminate between signal and background events. Events from WWW production are observed with a significance of 8.0 standard deviations, where the expectation is 5.4 standard deviations. The inclusive WWW production cross section is measured to be 820 +- 100 stat +- 80 syst fb, approximately 2.6 standard deviations from the predicted cross section of 511 +- 18 fb calculated at next-to-leading-order QCD and leading-order electroweak accuracy.
Observation of WWW Production in pp Collisions at sqrt(s) =13 TeV with the ATLAS Detector
G Chiodini;E Gorini;F Gravili;L Longo;M Primavera;M Reale;E Schioppa;S Spagnolo;A Ventura;
2022-01-01
Abstract
This Letter reports the observation of WWW production and a measurement of its cross section using 139 fb−1 of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Events with two same-sign leptons (electrons or muons) and at least two jets, as well as events with three charged leptons, are selected. A multivariate technique is then used to discriminate between signal and background events. Events from WWW production are observed with a significance of 8.0 standard deviations, where the expectation is 5.4 standard deviations. The inclusive WWW production cross section is measured to be 820 +- 100 stat +- 80 syst fb, approximately 2.6 standard deviations from the predicted cross section of 511 +- 18 fb calculated at next-to-leading-order QCD and leading-order electroweak accuracy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
