https://doi.org/10.1140/epjc/s10052-013-2368-z
Regular Article - Theoretical Physics
Effective squark/chargino/neutralino couplings: MadGraph implementation
1
Departamento de Física Teórica, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain
2
Departament de Física Fonamental, Institut de Ciències del Cosmos, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Catalonia, Spain
3
Departament d’Estructura i Constituents de la Matèria, Institut de Ciències del Cosmos, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Catalonia, Spain
* e-mail: siannah@unizar.es
Received:
3
October
2012
Revised:
20
February
2013
Published online:
4
April
2013
We have included the effective description of squark interactions with charginos/neutralinos in the MadGraph MSSM model. This effective description includes the effective Yukawa couplings, and another logarithmic term which encodes the supersymmetry-breaking. We have performed an extensive test of our implementation analyzing the results of the partial decay widths of squarks into charginos and neutralinos obtained by using FeynArts/FormCalc programs and the new model file in MadGraph. We present results for the cross-section of top-squark production decaying into charginos and neutralinos.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013
