# Scalar Democracy

**Authors:** Christopher T. Hill, Pedro A. N. Machado, Anders E. Thomsen, Jessica, Turner

arXiv: 1902.07214 · 2019-07-24

## TL;DR

The paper proposes a model where every pair of fundamental fermions has a corresponding scalar bound state, leading to many Higgs doublets with potential observable effects at current or future colliders.

## Contribution

It introduces the Scalar Democracy hypothesis, suggesting a scalar bound state for each fermion pair, and explores its implications for Higgs physics and flavor phenomena.

## Key findings

- Multiple Higgs doublets associated with fermion pairs are predicted.
- Heavy fermion-related doublets may be observable at the LHC.
- A Higgs seesaw mechanism for neutrino masses is proposed.

## Abstract

We conjecture that there exists a scalar bound state for every pair of fundamental fermions at a UV (`composite') scale, $\Lambda\gg v_{\text{weak}}$. This implies a large number of universally coupled, sub-critical Higgs doublets. All but the Standard Model Higgs are `dormant,' with large positive squared masses and each receives a small vacuum expectation values via mixing with the Standard Model Higgs. Universal couplings, modulo renormalization group running effects, flips the flavor problem into the masses and mixings of the Higgs system. Doublets associated with heavy fermion masses, $b,c, \tau$ likely lie in the multi-TeV range, but may be observable at the current LHC, or a high-luminosity and/or an energy-upgraded LHC. In the lepton sector we are lead to a Higgs seesaw for neutrino masses, and corollary processes of observable flavor violation. The observation of the first sequential doublet coupled to $\bar{b}b$ with masses $\lesssim 3.5$ TeV would lend credence to the hypothesis.

## Full text

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## Figures

7 figures with captions in the complete paper: https://tomesphere.com/paper/1902.07214/full.md

## References

60 references — full list in the complete paper: https://tomesphere.com/paper/1902.07214/full.md

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Source: https://tomesphere.com/paper/1902.07214