Search for doubly charged Higgs boson production in multi-lepton final states using 139 fb-1 of proton–proton collisions at √s = 13 TeV with the ATLAS detector

• Titel: Search for doubly charged Higgs boson production in multi-lepton final states using 139 fb-1 of proton–proton collisions at √s = 13 TeV with the ATLAS detector
• Mitwirkende: Aad, Georges [VerfasserIn]
• Mitwirkende: Baltes, Lisa Marie [VerfasserIn]
• Mitwirkende: Bartels, Falk [VerfasserIn]
• Mitwirkende: Castillo, Florencia Luciana [VerfasserIn]
• Mitwirkende: Czurylo, Marta [VerfasserIn]
• Mitwirkende: Rio, Fernando del [VerfasserIn]
• Mitwirkende: Dittmeier, Sebastian [VerfasserIn]
• Mitwirkende: Dunford, Monica [VerfasserIn]
• Mitwirkende: Franchino, Silvia [VerfasserIn]
• Mitwirkende: Klassen, Martin [VerfasserIn]
• Mitwirkende: Mkrtchyan, Tigran [VerfasserIn]
• Mitwirkende: Ott, Philipp [VerfasserIn]
• Mitwirkende: Rassloff, Damir Fabrice [VerfasserIn]
• Mitwirkende: Rodriguez Bosca, Sergi [VerfasserIn]
• Mitwirkende: Sauer, Christof [VerfasserIn]
• Mitwirkende: Schöning, André [VerfasserIn]
• Mitwirkende: Schultz-Coulon, Hans-Christian [VerfasserIn]
• Mitwirkende: Sothilingam, Varsiha [VerfasserIn]
• Mitwirkende: Stamen, Rainer [VerfasserIn]
• Mitwirkende: Starovoitov, Pavel [VerfasserIn]
• Mitwirkende: Vigani, Luigi [VerfasserIn]
• Mitwirkende: Weber, Sebastian [VerfasserIn]
• Mitwirkende: Wessels, Martin [VerfasserIn]
• Mitwirkende: Zinßer, Joachim [VerfasserIn]
• Körperschaft: ATLAS Collaboration [VerfasserIn]
• Verf.angabe: ATLAS Collaboration*
• E-Jahr: 2023
• Jahr: 12 July 2023
• Umfang: 32 S.
• Illustrationen: Illustrationen
• Fussnoten: *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, 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 sehr viele weitere Personen] ; Im Titel ist der Ausdruck "-1" hochgestellt ; Im Titel steht der Buchstabe s unter dem Wurzelsymbol ; Gesehen am 14.02.2024
• Titel Quelle: Enthalten in: The European physical journal. C, Particles and fields
• Ort Quelle: Berlin : Springer, 1998
• Jahr Quelle: 2023
• Band/Heft Quelle: 83(2023), 7, Artikel-ID 605, Seite 1-32
• ISSN Quelle: 1434-6052
• DOI: doi:10.1140/epjc/s10052-023-11578-9
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1880733501

Abstract

A search for pair production of doubly charged Higgs bosons (H+-+-), each decaying into a pair of prompt, isolated, and highly energetic leptons with the same electric charge, is presented. The search uses a proton-proton collision data sample at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 139 fb-1 recorded by the ATLAS detector during Run 2 of the Large Hadron Collider (LHC). This analysis focuses on same-charge leptonic decays, H+-+- → l+- l'+- where l, l' = e, mu, tau in two-, three-, and four-lepton channels, but only considers final states which include electrons or muons. No evidence of a signal is observed. Corresponding upper limits on the production cross-section of a doubly charged Higgs boson are derived, as a function of its mass m(H+-+-) at 95% confidence level. Assuming that the branching ratios to each of the possible leptonic final states are equal, B(H+-+- → e+-e+-) = B(H+-+- → e+-mu+-) = B(H+-+- → mu+-mu+-) = B(H+-+- → e+-tau+-) = B(H+-+- → mu+-tau+-) = B(H+-+- → tau+-tau+-) = 1/6, the observed (expected) lower limit on the mass of a doubly charged Higgs boson is 1080 GeV (1065 GeV) within the left-right symmetric type-II seesaw model, which is the strongest limit to date produced by the ATLAS Collaboration. Additionally, this paper provides the first direct test of the Zee-Babu neutrino mass model at the LHC, yielding an observed (expected) lower limit of m(H+-+-) = 900 GeV (880 GeV).