# Where are the Next Higgs Bosons?

## TL;DR

The paper predicts new Higgs doublets with masses up to 5 TeV, coupled to third-generation fermions, and discusses their potential detectability at current and future colliders.

## Contribution

It introduces a symmetry-based prediction of new Higgs doublets with universal Yukawa couplings, extending the Standard Model to include additional Higgs states.

## Key findings

- Prediction of a new $H_b$ doublet accessible at LHC energies.
- Extension to leptons predicts $H_ au$ and possibly $H_{
u_ au}$.
- Masses of new Higgs doublets are estimated to be up to 5 TeV.

## Abstract

Simple symmetry arguments applied to the third generation lead to a prediction: there exist new sequential Higgs doublets with masses of order $\lesssim 5 $ TeV, with approximately universal Higgs-Yukawa coupling constants, $g\sim 1$. This is calibrated by the known Higgs boson mass, the top quark Higgs-Yukawa coupling, and the $b$-quark mass. A new massive weak-isodoublet, $H_b$, coupled to the $b$-quark with $g\sim 1$ is predicted, and may be accessible to the LHC at $13$ TeV, and definitively at the energy upgraded LHC of $26$ TeV. The extension to leptons generates a new $H_\tau$ and a possible $H_{\nu_\tau}$ doublet. The accessibility of the latter depends upon whether the mass of the $\tau$-neutrino is Dirac or Majorana.