### Abstract

We present a definition of an on-shell renormalization scheme for the sfermion and chargino-neutralino sector of the Minimal Supersymmetric Standard Model (MSSM). Then, apply this renormalization framework to the interaction between charginos/neutralinos and sfermions. A kind of universal corrections is identified, which allow to define effective chargino/neutralino coupling matrices. In turn, these interactions generate (universal) non-decoupling terms that grow as the logarithm of the heavy mass. Therefore the full MSSM spectrum must be taken into account in the computation of radiative corrections to observables involving these interactions. As an application we analyze the full one-loop electroweak radiative corrections to the partial decay widths Γ(f̃ → fx0) and Γ(f̃ → f′x±) for all sfermion flavours and generations. These are combined with the QCD corrections to compute the corrected branching ratios of sfermions. It turns out that the electroweak corrections can have an important impact on the partial decay widths, as well as the branching ratios, in wide regions of the parameter space. The precise value of the corrections is strongly dependent on the correlation between the different particle masses. © SISSA/ISAS 2002.

Original language | English |
---|---|

Pages (from-to) | 887-937 |

Journal | Journal of High Energy Physics |

Volume | 6 |

Issue number | 10 |

Publication status | Published - 1 Oct 2002 |

### Keywords

- Renormalization Regularization and Renormalons
- Supersymmetric Standard Model
- Supersymmetry Phenomenology

## Fingerprint Dive into the research topics of 'Fermionic decays of sfermions: A complete discussion at one-loop order'. Together they form a unique fingerprint.

## Cite this

Guasch, J., Hollik, W., & Solà, J. (2002). Fermionic decays of sfermions: A complete discussion at one-loop order.

*Journal of High Energy Physics*,*6*(10), 887-937.