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 [Elektronisk resurs]

• 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 ( ρ tt ,  ρ tc , and  ρ tu ). 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  m H  between 200 − 630 GeV with couplings  ρ tt  = 0 . 4,  ρ tc  = 0 . 2, and  ρ tu  = 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. 

Ämnesord

Natural Sciences  (hsv)

Physical Sciences  (hsv)

Subatomic Physics  (hsv)

Naturvetenskap  (hsv)

Fysik  (hsv)

Subatomär fysik  (hsv)

Genre

government publication  (marcgt)

Indexterm och SAB-rubrik

Beyond Standard Model

Exotics

Hadron-Hadron Scattering