Adding doublet fermions to SM

[suryam]

Dear Florian,

I am trying to add two new fermions to SM model. So I did the following changes

[FermionFields[[6]] = {n1, 1, {n1uL, n1dL}, -1/2, 2, 1};
FermionFields[[7]] = {n2, 1, {n2uL, n2dL}, 1/2, 2, 1};]

And added mass term for the fermion and dim-5 operator

[Wop epsTensor[lef1,lef2] epsTensor[lef3,lef4] H.n1.H.n1- m1 epsTensor[lef1,lef2] n1.n2);

When I looked at the input lagrangian for Gauge ES(in PDF file), I found following things: fields n1 and and n2 appeared with additional indices. Vertices (two fermion- one vector) for corresponding mass eigenstates are with index{gt1} , rotation matrix Zf is summed over i=1,100 !!. I could not figure out what went wrong. Could you check my model file(attached). Your help will be much appreciated.

Thanks and regards

suryam

[FStaub]

Hi,

the problem is most likely the naming. n1 and n2 are used otherwise. Choose more specific names of at least 3 letters/digits.

Cheers
Florian

[suryam]

Thank you for your prompt reply.

I changed the field names to the following

[FermionFields[[6]] = {ch, 1, {cuL, cdL}, -1/2, 2, 1};
FermionFields[[7]] = {dh, 1, {duL, ddL}, 1/2, 2, 1};]

Now I do get correct rotation matrix. But still

1. I do get additional indices in the input lagrangian (EWSB PDF)
2. Vertices (two fermion- one vector) for corresponding mass eigenstates are with index{gt1} (this seems to be the case for all Majorana fermions)
3. shows, Error while calculating RGES (failed to write mathematica code to evaluate RGES)

Could you please have a look at the new model file I have added

Thanks

[FStaub]

Hi,

1) I haven't had time to check the pdf. In general, the output might not be perfect and some manipulations are needed afterwards.
2) Sure, the Majoranas must carry a generation index because they appear in two generations each.
3) I just tried quickly the RGEs and the work without problems. Do you use the most recent SARAH version. Note, the RGEs for the Weinberg operator (or any other higher dimensional operator) are not calculated.

Cheers,
Florian

[suryam]

Hi,

Yes, you are right. I was not using the updated version. Thank you.

Now I could generate RGES without any problem.

Thanks again for help

Cheers

Suryam