Publikationen

2022

• Precise calculation of the W boson pole mass beyond the standard model with FlexibleSUSY

  Athron, P., Bach, M., Jacob, D. H. J., Kotlarski, W., Stöckinger, D., & Voigt, A. (2022). Precise calculation of the W boson pole mass beyond the standard model with FlexibleSUSY. Physical Review D, 106(9), 14. http://doi.org/10.1103/PhysRevD.106.095023 (Original work published 11/2022)

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  We present an updated calculation of the W boson pole mass in models beyond the standard model with FlexibleSUSY. The calculation has a decoupling behavior and allows for a precise W-pole mass prediction up to large new physics scales. We apply the calculation to several standard model extensions, including the MRSSM where we show that it can be compatible with large corrections to the W boson mass that would be needed to fit the recent 2022 CDF measurement.

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    • Fachbereich 2: Energy and Life Science

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  • 2022
  • Journal Article
  • • Peter Athron
    • Markus Bach
    • Douglas Jacob
    • Wojciech Kotlarski
    • Dominik Stöckinger
    • Alexander Voigt
  • • W boson
    • arXiv
    • Teilchenphysik
    • FlexibleSUSY

• Two-loop prediction of the anomalous magnetic moment of the muon in the Two-Higgs Doublet Model with GM2Calc 2

  Athron, P., Balazs, C., Cherchiglia, A., Jacob, D. H. J., Stöckinger, D., Stöckinger-Kim, H., & Voigt, A. (2022). Two-loop prediction of the anomalous magnetic moment of the muon in the Two-Higgs Doublet Model with GM2Calc 2. The European Physical Journal C, 82, 31. http://doi.org/10.1140/epjc/s10052-022-10148-9 (Original work published 03/2022)

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  We present an extension of the GM2Calc software to calculate the muon anomalous magnetic moment (a_μ^BSM) in the Two-Higgs Doublet Model. The Two-Higgs Doublet Model is one of the simplest and most popular extensions of the Standard Model. It is one of the few single field extensions that can give large contributions to a_μ^BSM. It is essential to include two-loop corrections to explain the long standing discrepancy between the Standard Model prediction and the experimental measurement in the Two-Higgs Doublet Model. The new version GM2Calc 2 implements the state of the art two-loop calculation for the general, flavour violating Two-Higgs Doublet Model as well as for the flavour aligned Two-Higgs Doublet Model and the type I, II, X and Y flavour conserving variants. Input parameters can be provided in either the gauge basis or the mass basis, and we provide an easy to use SLHA-like command-line interface to specify these. Using this interface users may also select between Two-Higgs Doublet Model types and choose which contributions to apply. In addition, GM2Calc 2 also provides interfaces in C++, C, Python and Mathematica, to make it easy to interface with other codes.

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    • Fachbereich 2: Energy and Life Science

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  • 2022
  • Journal Article
  • • Peter Athron
    • Csaba Balazs
    • Adriano Cherchiglia
    • Douglas Jacob
    • Dominik Stöckinger
    • Hyejung Stöckinger-Kim
    • Alexander Voigt
  • • arXiv
    • Higgs
    • Muon
    • magnetic moment
    • Teilchenphysik

• FlexibleDecay: An automated calculator of scalar decay widths

  Athron, P., Büchner, A., Harries, D., Kotlarski, W., Stöckinger, D., & Voigt, A. (2022). FlexibleDecay: An automated calculator of scalar decay widths. Computer Physics Communications, 283, 27. http://doi.org/https://doi.org/10.1016/j.cpc.2022.108584 (Original work published 02/2023)

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  We present FlexibleDecay, a tool to calculate decays of scalars in a broad class of BSM models. The tool aims for high precision particularly in the case of Higgs boson decays. In the case of scalar and pseudoscalar Higgs boson decays the known higher order SM QED, QCD and EW effects are taken into account where possible. The program works in a modified MS scheme that exhibits a decoupling property with respect to heavy BSM physics, with BSM parameters themselves treated in the MS/DR-scheme allowing for an easy connection to high scale tests for, e.g., perturbativity and vacuum stability, and the many observable calculations readily available in MS/DR programs. Pure BSM effects are taken into account at the leading order, including all one-loop contributions to loop-induced processes. The program is implemented as an extension to FlexibleSUSY, which determines the mass spectrum for arbitrary BSM models, and does not require any extra configuration from the user. We compare our predictions for Higgs decays in the SM, singlet extended SM, type II THDM, CMSSM and MRSSM, as well as for squark decays in the CMSSM against a selection of publicly available tools. The numerical differences between our and other programs are explained. The release of FlexibleDecay officially deprecates the old effective couplings routines in FlexibleSUSY.

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  • 2022
  • Journal Article
  • • Peter Athron
    • Adam Büchner
    • Dylan Harries
    • Wojciech Kotlarski
    • Dominik Stöckinger
    • Alexander Voigt
  • • arXiv
    • Teilchenphysik
    • Higgs
    • BSM
    • Decays