Pythia requires a block called 'QNUMBERS' which contains few quantum numbers like electric charge, spin, color rep., etc for BSM particles in the param card (equivalently the SPheno.spc.model_name), but in my case, there is no Block QNUMBERS in the spheno.spc file. Is there any flag to write these b...

For my understanding: how do you compare your analytical results to those obtained by FlavorKit? The LFV process which I am studying is mu to e gamma (Block 701 in SPheno) in the context of a BSM model. [1] SPheno (FlavorKit) gives branching ratio (BR) for the said LFV process for a given set of pa...

Hi Saiyad, ... If so, I can think of two possible reasons: 1) Please check whether the involved loop functions are well-behaved ... So I would suggest you to check whether your (and FlavorKit's ) loop functions behave correctly in your numerics. Where can I find the loop functions used in FlavorKit...

I have been calculating branching ratio(s) for Lepton Flavor Violating processes like mu to e gamma in the context of a (non-supersymmetric) BSM model. I have calculated the same analytically and also implemented the model in SARAH, and using the SPheno module from SARAH output, I have generated the...

I am able to find all the vertices which include physical fields (e.g., SSS, SSSS, SSV, SSVV, SVV, FFS, FFV, VVV, VVVV, GGS,
GGV). But I also need the vertices including two fermions and one Goldstone boson. Can you help me out, please?

How can I get two fermions one goldstone boson interaction in a SARAH model ?

Still, I am getting the same error while generating the SPheno module in Mathematica. Write I/O routines Writing input routines Writing output routines Part::partd: Part specification None[[1]] is longer than depth of object. Part::partd: Part specification None[[2]] is longer than depth of object. ...

Model: Scotogenic Model (1). I am getting the following error while generating the SPheno module in Mathematica Write I/O routines Writing input routines Writing output routines Part::partd: Part specification None[[1]] is longer than depth of object. Part::partd: Part specification None[[2]] is lon...

I have changed the name of the blocks properly, but still, I am getting the following error while executing the SPheno LesHouches input file. Calculating branching ratios and decay widths Calculating one loop decays Loop masses not calculated: tree-level masses used for kinematics Loop masses not ca...

I am using SPheno-4.0.3 and SARAH-4.13.0.