Hi,
I'm writing a model with a quadruplet of an extra SU(2) gauge, singlet under the SM. For the kinetic terms, it seems that the 3-index, tensor form of the quadruplet is good enough for SARAH. For the scalar potential contractions are very involved, so instead I wrote each term in terms of the four quadruplet components quad1, quad2, quad3, quad4. Just as an example, a typical term looks like
Lag4plet = -( (9/5)*lam2 quad1.quad2.quad1.quad2 + (3/10)*lam3 quad3.quad3.quad4.quad4 );
Although SARAH and SPheno have many warnings of the form
Part: The expression pos cannot be used as a part specification
they give me a consistent analytical and numerical spectrum. The problem is that MakeCHEP[] repeats those warnings but it gets stuck and never finishes. How should I write Lagrangians in terms of the explicit component fields? Is it because quad1, quad2, quad3, quad4 are being asked for indices that belong to the full quadruplet field?
Thanks