Searching for doubly charged Higgs bosons in M\"{o}ller scattering by resonance effects at linear $e^-e^-$ collider

TL;DR

This paper investigates how doubly charged Higgs bosons could be detected at the ILC through resonance effects in M"{o}ller scattering, focusing on parity-violating asymmetries influenced by different scalar models.

Contribution

It introduces a method to test doubly charged Higgs bosons from singlet scalars at the ILC via resonance effects in M"{o}ller scattering, highlighting opposite contributions from triplet and singlet models.

Findings

Doubly charged Higgs bosons from singlet scalars can be tested at the ILC.

Resonance effects significantly enhance detection prospects.

Opposite contributions from triplet and singlet scalars to LRAs.

Abstract

We discuss the parity-violating left-right asymmetries (LRAs) in M\"{o}ller scattering at the International Linear Collider (ILC) induced by doubly charged Higgs bosons in models with $SU(2)_L$ triplet and singlet scalar bosons, which couple to the left- and right-handed charged leptons, respectively. These bosons are important in the scenarios for the generation of the neutrino mass. We demonstrate that the contributions to the LRAs from the triplet and singlet bosons are opposite to each other. In particular, we show that the doubly charged Higgs boson from the singlet scalar can be tested at the ILC by using the resonance effect.