Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s = 13 TeV : = Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at [square root]s = 13 TeV

Abstract: A search for Majorana neutrinos in same-sign W W scattering events is presented. The analysis uses √s = 13 TeV proton–proton collision data with an integrated luminosity of 140 fb−1 recorded during 2015–2018 by the ATLAS detector at the Large Hadron Collider. The analysis targets final states including exactly two same-sign muons and at least two hadronic jets well separated in rapidity. The modelling of the main backgrounds, from Standard Model samesign W W scattering and W Z production, is constrained with data in dedicated signal-depleted control regions. The distribution of the transverse momentum of the second-hardest muon is used to search for signals originating from a heavy Majorana neutrino with a mass between 50 GeV and 20 TeV. No significant excess is observed over the background expectation. The results are interpreted in a benchmark scenario of the Phenomenological Type-I Seesaw model. In addition, the sensitivity to the Weinberg operator is investigated. Upper limits at the 95% confidence level are placed on the squared muon-neutrino–heavy-neutrino mass-mixing matrix element |VμN | 2 as a function of the heavy Majorana neutrino’s mass mN , and on the effective μμ Majorana neutrino mass |mμμ|

Object Details

• Alternative title: Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at [square root]s ; 13 TeV
• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch
• Notes: The European physical journal. - 83, 9 (2023) , 824, ISSN: 1434-6052

Contributors, Places and Time

• Event: Veröffentlichung
• (where): Freiburg
• (who): Universität
• (when): 2024
• Creator: ATLAS Collaboration CERN, [Study Group] ; Argyropoulos, Spyridon ; Becherer, Fabian ; Böhler, Michael ; Burlayenko, Oleksandr ; Diehl, Leena ; Froch, Alexander ; Gurdasani, Simran Sunil ; Heidegger, Constantin ; Heidegger, Kim K. ; Herten, Gregor ; Jain, Prasham ; Jakobs, Karl ; Jenni, Peter ; Kalaitzidou, Ilia ; Karentzos, Efstathios ; Köneke, Karsten ; Küsters, Roman ; Kuprash, Oleg ; Landgraf, Ulrich ; Lang, Valerie ; Moskalets, Tetiana ; Öncel, Ömer Ogul ; Parzefall, Ulrich ; Plesanovs, Vladislavs ; Pretel, Jose ; Rafanoharana, Dimbiniaina ; Rodríguez Rodríguez, Arturo ; Rossini, Lorenzo ; Rottler, Benjamin ; Rúriková, Zuzana ; Sammel, Dirk ; Sauerburger, Frank ; Schleicher, Katharina E. ; Scholer, Patrick ; Schumacher, Markus ; Solovieva, Ksenia ; Sperlich, Dennis ; Weiser, Christian ; Winter, Benedict T. ; Zanzi, Daniele ; et al
• Contributor: Experimentelle Teilchenphysik

Further information

• DOI: 10.1140/epjc/s10052-023-11915-y
• URN: urn:nbn:de:bsz:25-freidok-2542830
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 25.03.2025, 1:42 PM CET