Details about the MSSM at NLO implementation in FeynRules

Author

• Benjamin Fuks, LPTHE / Sorbonne U. [ fuks @ lpthe.jussieu.fr ]

Reference

• S. Frixione, B. Fuks, V. Hirschi, K. Mawatari, H.S. Shao, M.P.A. Sunder and M. Zaro, Automated simulations beyond the Standard Model: supersymmetry, ​arXiv:1907.04898.

Description of the model

In contrast to the ​leading order MSSM implementation in FeynRules, the NLO MSSM implementation does not allow for inter-generational sfermion mixing and CP-violation beyond the one included in the CKM matrix. The implementation relies on the superspace capabilities of FeynRules (see ​arXiv:1102.4191) and follows the ​SUSY Les Houches accord (version 1). As there is some freedom in the way the model renormalisation in the on-shell scheme can be implemented, the user is free to implement his/her own by making use of a FeynRules plugin called MoGRe. A few examples of usage can be found below and in ​arXiv:1907.04898.

Model files

• mssm-nlo.fr: The model file. The current (and first public) version is v1.5. A restriction file with 5 flavours can be downloaded here.
• MoGRe.m: The MoGRe plugin to FeynRules.
• use-MoGRe.nb: An example of Mathematica® notebook loading the model and the parameters and using MoGRe for the renormalisation.
• mssmatnlo.ufo.tar.gz: The UFO model used for the computations of ​arXiv:1907.04898. It contains extra simplifications with respect to the full MSSM (e.g. the Higgs sector is absent).