NPointFunctions: a calculator of amplitudes and observables in FlexibleSUSY

TL;DR

NPointFunctions is a modular software package that extends FlexibleSUSY to calculate amplitudes and observables for BSM models up to one-loop level, leveraging SARAH-generated outputs.

Contribution

It introduces a customizable, extensible tool for calculating amplitudes and observables in BSM models within FlexibleSUSY, integrating SARAH, FeynArts, and FormCalc.

Findings

Enables calculations up to one-loop level for BSM models.

Provides a flexible, modular extension to FlexibleSUSY.

Facilitates incorporation of process-dependent contributions.

Abstract

We present $\texttt{NPointFunctions}$, a package to incorporate desired amplitudes and observables for an arbitrary BSM model in $\texttt{FlexibleSUSY}$. The package relies on the $\texttt{SARAH}$-generated output used with $\texttt{FeynArts}/\texttt{FormCalc}$, embedded in an appropriate way, thus allowing calculations up to one-loop level. The resulting tool is an extension to $\texttt{FlexibleSUSY}$, a generator of spectrum generator programs. $\texttt{NPointFunctions}$ was designed to be customizable, modular and extensible with additional process- or amplitude- dependent contributions. We explain, how these goals are achieved, and discuss modifications to the default $\texttt{FlexibleSUSY}$ workflow.