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SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry

F. Mahmoudi

TL;DR

This paper introduces SuperIso v3.0, a public tool for computing a broad set of flavor observables across SM, 2HDM, MSSM, and NMSSM, including NNLO SM contributions to B→X_sγ and the muon g−2. It details the package structure, parameter handling, and the workflow that integrates SLHA inputs from external spectrum calculators to produce precise predictions for diverse decay channels and constraints. The authors demonstrate the utility of the program in constraining SUSY parameter spaces (e.g., mSUGRA, NUHM) and discuss its role in guiding LHC searches and consistency checks. The manuscript also provides extensive methodological background, input/output specifications, and references for the calculations, positioning SuperIso as a versatile and expandable platform for indirect probes of new physics.

Abstract

We describe SuperIso v3.0 which is a public program for evaluation of flavor physics observables in the Standard Model (SM), general two-Higgs-doublet model (2HDM), minimal supersymmetric Standard Model (MSSM) and next to minimal supersymmetric Standard Model (NMSSM). SuperIso v3.0, in addition to the branching ratio of B -> X_s gamma and the isospin asymmetry of B -> K* gamma, incorporates other flavor observables such as the branching ratio of B_s -> mu+ mu-, the branching ratio of B -> tau nu_tau, the branching ratio of B -> D tau nu_tau, the branching ratio of K -> mu nu_mu and the branching ratios of D_s -> tau nu_tau and D_s -> mu nu_mu. The calculation of the branching ratio of B -> X_s gamma is also improved, as it includes NNLO Standard Model contributions. The program also computes the muon anomalous magnetic moment (g-2). Nine sample models are included in the package, namely SM, 2HDM, and mSUGRA, NUHM, AMSB and GMSB for the MSSM, and CNMSSM, NGMSB and NNUHM for the NMSSM. SuperIso uses a SUSY Les Houches Accord file (SLHA1 or SLHA2) as input, which can be either generated automatically by the program via a call to external spectrum calculators, or provided by the user. The calculation of the observables is detailed in the Appendices, where a suggestion for the allowed intervals for each observable is also provided.

SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry

TL;DR

This paper introduces SuperIso v3.0, a public tool for computing a broad set of flavor observables across SM, 2HDM, MSSM, and NMSSM, including NNLO SM contributions to B→X_sγ and the muon g−2. It details the package structure, parameter handling, and the workflow that integrates SLHA inputs from external spectrum calculators to produce precise predictions for diverse decay channels and constraints. The authors demonstrate the utility of the program in constraining SUSY parameter spaces (e.g., mSUGRA, NUHM) and discuss its role in guiding LHC searches and consistency checks. The manuscript also provides extensive methodological background, input/output specifications, and references for the calculations, positioning SuperIso as a versatile and expandable platform for indirect probes of new physics.

Abstract

We describe SuperIso v3.0 which is a public program for evaluation of flavor physics observables in the Standard Model (SM), general two-Higgs-doublet model (2HDM), minimal supersymmetric Standard Model (MSSM) and next to minimal supersymmetric Standard Model (NMSSM). SuperIso v3.0, in addition to the branching ratio of B -> X_s gamma and the isospin asymmetry of B -> K* gamma, incorporates other flavor observables such as the branching ratio of B_s -> mu+ mu-, the branching ratio of B -> tau nu_tau, the branching ratio of B -> D tau nu_tau, the branching ratio of K -> mu nu_mu and the branching ratios of D_s -> tau nu_tau and D_s -> mu nu_mu. The calculation of the branching ratio of B -> X_s gamma is also improved, as it includes NNLO Standard Model contributions. The program also computes the muon anomalous magnetic moment (g-2). Nine sample models are included in the package, namely SM, 2HDM, and mSUGRA, NUHM, AMSB and GMSB for the MSSM, and CNMSSM, NGMSB and NNUHM for the NMSSM. SuperIso uses a SUSY Les Houches Accord file (SLHA1 or SLHA2) as input, which can be either generated automatically by the program via a call to external spectrum calculators, or provided by the user. The calculation of the observables is detailed in the Appendices, where a suggestion for the allowed intervals for each observable is also provided.

Paper Structure

This paper contains 34 sections, 183 equations, 2 figures, 10 tables.

Table of Contents

  1. Introduction
  2. Content of the SuperIso v3.0 package
  3. Parameter structure
  4. Main routines
  5. Compilation and installation instructions
  6. Input and output description
  7. SLHA input file
  8. SM main program
  9. mSUGRA inputs
  10. AMSB inputs
  11. GMSB inputs
  12. NUHM inputs
  13. CNMSSM inputs
  14. NGMSB inputs
  15. NNUHM inputs
  16. ...and 19 more sections

Figures (2)

  • Figure 1: Constraints in mSUGRA $(m_{1/2} - m_0)$ parameter plane. For the description of the various colored zones see the text. The contours are superimposed in the order given in the legend.
  • Figure 2: Constraints in NUHM $(m_A - \tan\beta)$ parameter plane. For the description of the various colored zones see the text. The contours are superimposed in the order given in the legend.