# Corrections to (pseudo)scalars decay into a fermion pair from gravitational torsion

## TL;DR

This paper investigates how gravitational torsion-induced four-fermion interactions affect the decay rates of neutral (pseudo)scalar particles into fermion pairs, with applications to Higgs and two-Higgs-doublet models.

## Contribution

It introduces a new torsion-related four-fermion interaction affecting scalar decay widths and applies this to standard and two-Higgs-doublet models.

## Key findings

- Torsion modifies scalar decay branching ratios.
- The formalism impacts Higgs decay predictions.
- Applications to specific models demonstrate measurable effects.

## Abstract

We study the contribution of the torsion-descendent four-fermion contact interaction to the decay width of a neutral (pseudo)scalar field into a fermion pair. This new interaction comes from the existence of gravitational torsion in models with extra dimensions. Additionally, we exemplify the formalism with two examples: first, the variation of the considered branching ratio of the Higgs in the context of the standard model, and second the proper variations of the scalar and pseudo scalar fields of the type II-1 two Higgs doublets model.