Observation of WWW production in pp collisions at √s=13 TeV with the ATLAS detector

Observation of WWW production in pp collisions at √s=13 TeV with the ATLAS detector

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...

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Hauptverfasser: Aad, Georges, Abbott, Brad, Abbott, Dale C, Abed Abud, Adam, Abeling, Kira, Abhayasinghe, Deshan Kavishka, Abidi, Syed Haider, Aboulhorma, Asmaa, Abramowicz, Halina, Abreu, Henso, Ananiev, Viktor, Bjørke, Kristian, Bugge, Magnar Kopangen, Cameron, David Gordon, Catmore, James Richard, Gramstad, Eirik, Heggelund, Andreas, Håland, Even Simonsen, Morisbak, Vanja, Ould-Saada, Farid, Pedersen, Maiken, Read, Alexander Lincoln, Rye, Eli Bæverfjord, Røhne, Ole Myren, Sandaker, Heidi, Vadla, Knut Oddvar Høie, Buanes, Trygve, Djuvsland, Julia Isabell, Eigen, Gerald, Fomin, Nikolai, Huiberts, Simon Kristian, Latour, Bertrand Pascal Christian, Lee, Graham Richard, Lipniacka, Anna, Stugu, Bjarne Sandvik, Træet, Are Sivertsen, Abulaiti, Yiming, Abusleme Hoffman, Angel C, Acharya, Bobby S, Achkar, Baida, Adam, Lennart, Adam-Bourdarios, Claire, Adamczyk, Leszek, Adamek, Lukas, Addepalli, Sagar Vidya, Adelman, Jareed, Adigüzel, Aytül, Adorni, Sofia, Adye, Tim, Affolder, Anthony Allen, ATLAS, Collaboration
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Sprache:eng
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Zusammenfassung: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.