Precision calculations in the MSSM Higgs-boson sector with FeynHiggs 2.14

H. Bahl*, T. Hahn, S. Heinemeyer, W. Hollik, S. Paßehr, H. Rzehak, G. Weiglein

*Kontaktforfatter for dette arbejde

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We present an overview of the status and recent developments of FeynHiggs (current version: 2.14.3) since version 2.12.2. The main purpose of FeynHiggs is the calculation of the Higgs-boson masses and other physical observables in the MSSM. For a precise prediction of the Higgs-boson masses for low and high SUSY scales, state-of-the-art fixed-order and effective-field-theory calculations are combined. We first discuss improvements of the fixed-order calculation, namely an optional DR¯ renormalization of the stop sector and a renormalization of the Higgs sector ensuring the chosen input mass to be equivalent with the corresponding physical mass. Second, we describe improvements of the EFT calculation, i.e. an implementation of non-degenerate threshold corrections as well as an interpolation for complex parameters. Lastly, we highlight some improvements of the code structure easing future extensions of FeynHiggs to models beyond the MSSM. New version program summary: Program Title: FeynHiggs Program Files doi: Licensing provisions: GPLv3 Programming language: Fortran, C, Mathematica Journal reference of previous version: Comput. Phys. Comm. 180 (2009) 1426 Does the new version supersede the previous version? Yes. Reasons for the new version: Improved calculations and code structure. Summary of revisions: Apart from improvements discussed in other publications: implementation of optional DR¯ renormalization of stop sector, adapted two-loop Higgs sector renormalization, implementation of full non-degenerate threshold corrections, interpolation of EFT calculation for complex parameters, better code structure. Nature of problem: The Minimal Supersymmetric Standard Model (MSSM) allows predictions for the masses and mixings of the Higgs bosons in terms of a few relevant parameters. Therefore, comparisons to experimental data provide constraints on the parameter space. To fully profit from the experimental precision, a comparable level of precision is needed for the theoretical prediction. Solution method: State-of-the-art fixed-order and effective-field-theory calculations are combined to obtain a precise prediction for small as well as large supersymmetry scales.

TidsskriftComputer Physics Communications
Antal sider12
StatusUdgivet - apr. 2020

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