Hi Florian,

I'm continuing to experiment with SPheno versions with CKM matrix. What I observe is that whether or not of diagonal (tree-level) decays work is connected with the order of fields in the Yukawa interactions. Take for example the build in SM. The Yukawa terms there are This does only give top quark decays to bottom quark and a W. While if I modify it to then I'm getting all off-diagonal decays. Can you comment on that? If the order matters, shouldn't all models be written like that? Or is there some trick there?

cheers,
Wojciech

Of course, the definition of the Lagrangian must be consistent with the conventions of spheno to apply flavour mixing. Therefore, there is a function which should check the order of the quarks in the Yukawa terms, and adjust the spheno output accordingly. I need to check why this seems not to work. For the moment, you can use the workaround and change the Lagrangian by hand as you did.

Cheers
Florian