NPointFunctions: a calculator of amplitudes and observables in FlexibleSUSY

Abstract

We present $\text{NPointFunctions}$, a package to incorporate desired amplitudes and observables for an arbitrary BSM model in $\text{FlexibleSUSY}$. The package relies on the $\text{SARAH}$-generated output used with $\text{FeynArts}/\text{FormCalc}$, embedded in an appropriate way, thus allowing calculations up to one-loop level. The resulting tool is an extension to $\text{FlexibleSUSY}$, a generator of spectrum generator programs. $\text{NPointFunctions}$ 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 $\text{FlexibleSUSY}$ workflow.

Comments: Contribution to Computational Tools for High Energy Physics and Cosmology (CompTools2021), 7 pages, 1 figure