Hi SARAH staff,

I was wondering if branching fractions into gravitinos are ever calculated by SPheno when using a custom LesHouches low-scale input file (for example, in a Dirac gaugino model with chargino NLSP and gravitino LSP) or are these restricted to the case when one chooses GMSB in the MODSEL block?

Best,
Charlie

Hi,

SARAH supports only spin 0,1/2,1 particles, i.e. gravitinos are not included in any model and the decays are never calculated by SARAH generated SPheno versions. Only the 'standard' SPheno version includes the gravitino decays in the GMSB (MSSM only).

Cheers,
Florian