Searching for a charged Higgs boson with both $H^{\pm }{W}^{\mp }Z$ and $H^{\pm }tb$ couplings at the LHC

Abstract

In certain new physics scenarios, a singly charged Higgs boson can couple to both fermions and $W^{\pm }Z$ at tree level. We develop new strategies beyond current experimental searches using $pp\to jj{H}^{\pm }$, $H^{\pm }\to tb$ at the Large Hadron Collider (LHC). With the effective $H^{\pm }{W}^{\mp }Z$ and $H^{\pm }tb$ couplings we perform a model-independent analysis at the collision energy $\sqrt{s}=13$~TeV with the integrated luminosity of $3{\text{ab}}^{-1}$. We derive the discovery prospects and exclusion limits for the charged Higgs boson in the mass range from 200~GeV to 1~TeV. With $|F_{WZ}|,|A_t|\sim 0.5-1.0$ and $300\text{GeV}\lesssim m_{H^{\pm }}\lesssim 400\text{GeV}$, we point out that a discovery significance of $5\sigma$ can be achieved. The constraints and projected sensitivities are also discussed in a realistic model, i.e., the modified Georgi-Machacek model without custodial symmetry. Our proposed search would provide direct evidence for a charged Higgs boson $H^{\pm }$ that couples to $W^{\pm }Z$ and $tb$, which can have better sensitivity to the couplings of $H^{\pm }{W}^{\mp }Z$ and $H^{\pm }tb$ than current searches.

arXiv commentmatch the published version in JHEP

References in corpus (25)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• FastJet user manual
• Asymptotic formulae for likelihood-based tests of new physics
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• Theory and phenomenology of two-Higgs-doublet models
• Parton distributions with LHC data
• Minimal Dark Matter
• Radiative Corrections to the $Zb\bar{b}$ Vertex and Constraints on Extended Higgs Sectors
• Prospects for charged Higgs searches at the LHC
• Testing the custodial symmetry in the Higgs sector of the Georgi-Machacek model
• Anomalous Top-Higgs Couplings and Top Polarisation in Single Top and Higgs Associated Production at the LHC
• All the generalized Georgi-Machacek models
• Possible enhancement of the $e^{+}{e}^{-}\to H^{\pm }{W}^{\mp }$ cross section in the two-Higgs-doublet model
• Exotic Leptons: Higgs, Flavor and Collider Phenomenology
• An effective lagrangian description of charged Higgs decays H^+ -> Wg, WZ and Wh
• Perturbativity and a Fourth Generation in the MSSM
• Potential for measuring the H^\pm W^\mp Z^0 vertex from WZ fusion at the Large Hadron Collider
• Enhancement of the $H^{\pm }{W}^{\mp }Z$ vertex in the three scalar doublet model
• Distinguishing charged Higgs bosons from different representations at the LHC
• Measuring the ratio of $HWW$ and $HZZ$ couplings through $W^{+}{W}^{-}H$ production
• Models with higher weak-isospin Higgs multiplets
• Impacts of multi-Higgs on the $\rho$ parameter, decays of a neutral Higgs to $WW$ and $ZZ$, and a charged Higgs to $WZ$

Cited by in corpus (6)

• Charged Higgs searches in the Georgi-Machacek model at the LHC
• Sub-TeV $H^{+}$ Boson Production as Probe of Extra Top Yukawa Couplings
• Excited doubly heavy baryon production via $W^{+}$ boson decays
• Impact of Yukawa-like dimension-5 operators on the Georgi-Machacek model
• Probing the $H^{\pm }{W}^{\mp }Z$ interaction at the high energy upgrade of the LHC
• Fingerprinting the contribution of colored scalars to the $H^{+}{W}^{-}Z(\gamma )$ vertex