Dear Florian, all,

I am currently using SARAH to generate a Seesaw1 version for SPheno. However, I would like to integrate out the three RHNs at the exact same scale, which will be given by M_RHN = A*M_GUT, where A is just a number.

I have no idea if SARAH/SPheno is able to use recursively the GUT scale, which will change during the up and down running and matching. No idea neither how to access to the value of M_GUT within SARAH in order to setup the scale where to integrate out the RHNs.

Many thanks for your help,
Best,
Jordan

Hi,

that won't work out of the box. However ,the modifications in the Fortran code should be rather simple:
in Boundaries_$MODEL.f90 all GUT boundary conditions are applied in the function BoundaryHS, and this function actually gets als input the GUT scale via the parameter mGUT.

Cheers,
Florian