Search for heavy Higgs bosons with flavour-violating couplings in multi-lepton plus b-jets final states in pp collisions at 13TeV with the ATLAS detector
Metadatos
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Springer Nature
Materia
Beyond Standard Model Exotics Hadron-Hadron Scattering
Fecha
2023-12-12Referencia bibliográfica
The ATLAS collaboration., Aad, G., Abbott, B. et al. 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. J. High Energ. Phys. 2023, 81 (2023). https://doi.org/10.1007/JHEP12(2023)081
Patrocinador
CERN; MICINN; COST; ERC; ERDF; Horizon 2020; Marie Skłodowska-Curie Actions; La Caixa Banking Foundation; CERCA Programme Generalitat de Catalunya; PROMETEO and GenT Programmes Generalitat ValencianaResumen
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 = 13TeV 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.