MunuSSM: A python package for the [formula omitted]-from-[formula omitted] Supersymmetric Standard Model

Abstract

We present the public python package munuSSM that can be used for phenomenological studies in the context of the μ-from-ν Supersymmetric Standard Model (μνSSM). The code incorporates the radiative corrections to the neutral scalar potential at full one-loop level. Sizable higher-order corrections, required for an accurate prediction of the SM-like Higgs-boson mass, can be consistently included via an automated link to the public code FeynHiggs. In addition, a calculation of effective couplings and branching ratios of the neutral and charged Higgs bosons is implemented. This provides the required ingredients to check a benchmark point against collider constraints from searches for additional Higgs bosons via an interface to the public code HiggsBounds. At the same time, the signal rates of the SM-like Higgs boson can be tested applying the experimental results implemented in the public code HiggsSignals. The python package is constructed in a flexible and modular way, such that it provides a simple framework that can be extended by the user with further calculations of observables and constraints on the model parameters. Program summaryProgram title: munuSSMCPC Library link to program files:https://doi.org/10.17632/s7r25zcpcy.1Developer’s repository link:https://gitlab.com/thomas.biekoetter/munussmLicensing provisions: GPLv3Programming language: Fortran, PythonNature of problem: We present a programme to analyse the Higgs sector of an extension of the Standard Model (SM) called the μ-from-ν Supersymmetric Standard Model (μνSSM). Based on the precise theoretical prediction of the scalar spectrum and the couplings of the Higgs bosons, the goal is to confront the model with experimental constraints. The programme provides an easy-to-use framework to compute further model predictions by making use of the already existing implementation.Solution method: The radiative corrections to the neutral scalar masses are calculated at full one-loop level. For an accurate prediction of the SM-like Higgs boson, sizable higher-order corrections are included in an approximate form. The calculation of cross sections and branching ratios to SM particles is implemented by rescaling the SM predictions with effective coupling coefficients. Exotic decays of the Higgs bosons are computed at tree level. Based on these ingredients, a parameter point can be checked against constraints from collider experiments.