Beck, H.P.; Chatterjee, M.; Halser, L.; Haug, S.; Mobius, S.; Müller, R.; O'Neill, A.P.; Schefer, M.M.; Weber, M.S. (2023). Search for heavy Higgs bosons with flavour-violating couplings in multi-lepton plus b-jets final states in pp collisions at 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2023(12) Springer 10.1007/JHEP12(2023)081
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A search for new heavy scalars with flavour-violating decays in final states with multiple leptons and b-tagged jets is presented. The results are interpreted in terms of a general two-Higgs-doublet model involving an additional scalar with couplings to the top-quark and the three up-type quarks (ρtt, ρtc, and ρtu). The targeted signals lead to final states with either a same-sign top-quark pair, three top-quarks, or four top-quarks. The search is based on a data sample of proton-proton collisions at √s = 13 TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb−1. Events are categorised depending on the multiplicity of light charged leptons (electrons or muons), total lepton charge, and a deep-neural-network output to enhance the purity of each of the signals. Masses of an additional scalar boson mH between 200 − 630 GeV with couplings ρtt = 0.4, ρtc = 0.2, and ρtu = 0.2 are excluded at 95% confidence level. Additional interpretations are provided in models of R-parity violating supersymmetry, motivated by the recent flavour and (g − 2)μ anomalies.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Beck, Hans Peter, Chatterjee, Meghranjana, Halser, Lea, Haug, Sigve, Möbius, Silke, Müller, Roman, O'Neill, Aaron Paul, Schefer, Meinrad Moritz, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
31 Jan 2024 15:49 |
Last Modified: |
30 Jun 2024 02:19 |
Publisher DOI: |
10.1007/JHEP12(2023)081 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autor*innen namentlich erwaehnt; the ATLAS collaboration |
Uncontrolled Keywords: |
Beyond Standard Model, Exotics, Hadron-Hadron Scattering |
BORIS DOI: |
10.48350/191811 |
URI: |
https://boris.unibe.ch/id/eprint/191811 |
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