Probing Charged Higgs Bosons in the 2-Higgs Doublet Model Type-II with Vector-Like Quarks

Abstract

We study the phenomenology of charged Higgs bosons ($H^{\pm }$) and Vector-Like Quarks (VLQs), denoted as $T$, the latter possessing a charge identical to the top quark one, within the framework of the Two Higgs Doublet Model Type-II (2HDM-II). Upon examining two scenarios, one featuring a singlet $(T)$ (2HDM-II+$(T)$) and another a doublet $(TB)$ (2HDM-II+$(TB)$), we discover that the presence of VLQs has a significant effect on the (pseudo)scalar sector of the 2HDM-II. In particular, this leads to a reduction in the strict constraint on the mass of the charged Higgs boson, which is imposed by $B$-physics observables, specifically $B\to X_s\gamma$. {The observed reduction stems from modifications in the charged Higgs couplings to the Standard Model (SM) top and bottom quarks}. Notably, the degree of this reduction varies distinctly between the singlet 2HDM+$(T)$ and doublet 2HDM+$(TB)$ scenarios. Additionally, our investigation extends to constraints imposed by the oblique parameters $S$ and $T$ on the VLQ mixing angles. Furthermore, to facilitate efficient exploration of the '2HDM-II+VLQ' parameter space, we present results on pair production of VLQs $T$ ($pp\to T\bar{T}$), followed by $T\to H^{\pm }b$ and $H^{\pm }\to tb$ decays, yielding a distinctive $2t4b$ final state. This investigation thus provides valuable insights guiding the search for extended Higgs and quark sectors at the Large Hadron Collider (LHC) at CERN.

29 pages, 13 figures. Text revised, new figures and references added, version accepted for publication in Physical Review D

References in corpus (23)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Light custodians in natural composite Higgs models
• SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry
• A precision constraint on multi-Higgs-doublet models
• HiggsSignals-2: Probing new physics with precision Higgs measurements in the LHC 13 TeV era
• The Higgs boson from an extended symmetry
• HiggsTools: BSM scalar phenomenology with new versions of HiggsBounds and HiggsSignals
• Higgs Boson Mass, Sparticle Spectrum and Little Hierarchy Problem in Extended MSSM
• Measurement of the $B_s^0\to {\mu }^{+}{\mu }^{-}$ decay properties and search for the $B^0\to {\mu }^{+}{\mu }^{-}$ and $B_s^0\to {\mu }^{+}{\mu }^{-}\gamma$ decays
• Analysis of neutral $B$-meson decays into two muons
• Low Scale Flavor Gauge Symmetries
• Bounds and Decays of New Heavy Vector-like Top Partners
• Measurement of the B${}_{\mathrm{S}}^0$ $\to$ ${\mu }^{+}{\mu }^{-}$ decay properties and search for the B${}^0$ $\to$ ${\mu }^{+}{\mu }^{-}$ decay in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Gauged Flavor Group with Left-Right Symmetry
• Search for pair production of vector-like T and B quarks in single-lepton final states using boosted jet substructure in proton-proton collisions at sqrt(s) = 13 TeV
• Search for pair production of vector-like quarks in leptonic final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Search for pair-production of vector-like quarks in $pp$ collision events at $\sqrt{s}=13$ TeV with at least one leptonically decaying $Z$ boson and a third-generation quark with the ATLAS detector
• Z-peaked excess from heavy gluon decays to vector-like quarks
• Search for single production of a vector-like T quark decaying to a top quark and a Z boson in the final state with jets and missing transverse momentum at $\sqrt{s}=$ 13 TeV
• Signals with six bottom quarks for charged and neutral Higgs bosons
• Search for single production of vector-like $T$ quarks decaying into $Ht$ or $Zt$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Scalable Qubit Representations of Neutrino Mixing Matrices
• Search for single vector-like $B$ quark production and decay via $B\to bH(b\bar{b})$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Cited by in corpus (6)

• The oblique parameters in the 2HDM with Vector-Like Quarks: Confronting $M_W$ CDF-II Anomaly
• Anatomy of Vector-Like Top-Quark Models in the Alignment Limit of the 2-Higgs Doublet Model Type-II
• Anatomy of Vector-Like Bottom-Quark Models in the Alignment Limit of the 2-Higgs Doublet Model Type-II
• Search for charged Higgs bosons through vector-like top quark pair production at the LHC
• Impact of hidden heavy Higgs channels of VLB-Quarks below 1 TeV in 2HDM
• Searching for single production of vectorlike quarks decaying into Wb at a future muon-proton collider