Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s =13 TeV
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 includ...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
15 September 2023
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| In: |
The European physical journal. C, Particles and fields
Year: 2023, Jahrgang: 83, Heft: 9, Pages: 1-26 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-023-11915-y |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-023-11915-y
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| Verfasserangaben: | ATLAS Collaboration |
MARC
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| 245 | 1 | 0 | |a Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s =13 TeV |c ATLAS Collaboration |
| 246 | 3 | 3 | |a Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at square root s = 13 TeV |
| 264 | 1 | |c 15 September 2023 | |
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| 500 | |a The ATLAS collaboration: G. Aad, L.M. Baltes, F. Bartels, F.L. Castillo, M.M. Czurylo, F. Del Rio, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser [und viele weitere] | ||
| 500 | |a Gesehen am 07.06.2024 | ||
| 520 | |a 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 m N , and on the effective μμ Majorana neutrino mass |mμμ|. | ||
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