Hi, I have implemented a model with an extra SU(2) gauge symmetry, whose new neutral vector bosons X1,X2,X3 mix with the photon and the Z in a large {VP,VZ,VX1,VX2,VX3} mixing matrix. I am able to obtain a valid .spc file in SPheno without fatal warnings. However, MakeCHEP[] is having trouble with t...

Hi Werner,

My input itself is negative, for example a \lambda coupling in the range

Min -> -10^-5, Max -> -10^-3, Distribution -> LOG

Cheers,
charlie

Hello,

Are there alternatives to run a scan over a range of negative values in log scale? As expected Distribution -> LOG runs into trouble. I noticed in Package/Scan.m the option USERDEFINED (line 166), could you provide a template on its usage?

Thanks,
charlie

Hi forum, May I ask what is the purpose of the tiny positive piece that is added to fermions squared mass in TreeLevelMasses.f90, If (Abs(MFv2(i1)).Le.MaxMassNumericalZero) MFv2(i1) = Abs(MFv2(i1))+1.E-10_dp In my model, this makes my Dirac neutrinos, massless at tree-level, to be Mnu^2=10^-10 GeV^2...

This may be too late, but make sure you re-compiled the binary after commenting the lines

Hi, In my Z' model hypercharge comes from the breaking of a higher SU2 x U1' so to get the actual MZ I commented some lines in "Set pole masses" in one of the .f90 routines (I set flag #61 to zero for no running). My MZ is very sensitive to whatever value of g2 is used by SPheno. How exactly is the ...

Your suggestion is very helpful. Thanks Florian

Hi, In a model with gauge group SU(2)R x SU(2)L x U1(X) I am struggling to get the variations of the W and Z SM-like masses in terms of the new gauge coupling gR and the vev vR of a bidoublet scalar that breaks both SU(2)s. I can reproduce the SPheno output with the SARAH analytical eigenvalues for ...

Hi MDGoodsell, Indeed I separated the distinct generations and edited the particles/parameter files (attached). To avoid clashes I defined all new parameters locally. The problematic terms are the 3 mass terms for Right-handed Neutrinos (mee, kem, ket). I get the exact same texture as in 1107.5238 E...

Hi Florian, II'm implementing a U(1)_{Lmu-Ltau} gauge model by assigning distinct charges to the distinct lepton generations. But I'm getting critical errors when calculating vertices. First, when I run Start[U1-MuTau] it gives Checking model files: All files okay but there is a warning "Particle::u...