# Phenomenology of GeV-scale scalar portal

## TL;DR

This paper reviews the phenomenology of GeV-scale scalar particles mixing with the Higgs, analyzing various production channels across different experimental setups to aid in future sensitivity calculations.

## Contribution

It extends previous analyses by comparing multiple production mechanisms of scalar particles across various experimental conditions.

## Key findings

- Production channels vary in significance depending on beam energy.
- Scalar production from meson decays is substantial.
- Results are provided for experimental sensitivity calculations.

## Abstract

We review and revise the phenomenology of the scalar portal -- a new scalar particle with the mass in GeV range that mixes with the Higgs boson. In particular, we consider production channels $B\to S K_1(1270)$ and $B\to S K_0^*(700)$ and show that their contribution is significant. We extend the previous analysis by comparing the production of scalars from decays of mesons, of the Higgs bosons and direct production via proton bremsstrahlung, deep inelastic scattering and coherent scattering on nuclei. Relative efficiency of the production channels depends on the energy of the beam and we consider the energies of DUNE, SHiP and LHC-based experiments. We present our results in the form directly suitable for calculations of experimental sensitivities.