Dear Florian,

I am trying to implement supersymmetric left-right model in SARAH. The model I am trying to implement is the minimal LRSUSY with 2 bidoublets (Phi1, Phi2), 2 right-handed triplets (deltaR, deltaRbar), 2 left-handed triplets (deltaL, deltaLbar) and a singlet scalar (Sing). The matter sector is the same as in LR models. I have used the soft masses for solving the tadpole equations. The model runs fine but when I try to generate the SPheno output I keep getting the message

SPheno::Tadpoles: No solution found for tadpole equations. Given parameters: {mPhi12,mPhi22,mPhi1Phi22,mPhi2Phi12,mdeltaR2,mdeltaRbar2,msing2}

Also while "Writing SPheno two loop diagrammatic Higgs mass" it gives error message
Part::partw: Part 1 of {} does not exist.

I am not sure what I am doing wrong. If you please let me know exactly what is needed to be done, it will be very helpful.

Thanks a lot.

Hi,

I think the problem might be the one-loop corrected tadpole equations. SARAH parametrizes them with counter-terms \delta t_i which are added to the tree-level equations. Solutions might only exist if some of these terms fulfill specific relations. Can you check if this guess is correct when you try to solve Cheers,
Florian

Dear Florian,

I have tried to run the command that you had sent but it simply does not give any solution. It just gives an error message

Solve::ifun: Inverse functions are being used by Solve, so some solutions may not be found; use Reduce for complete solution information.

and then gives

{ }

as the solution. Since Tad is not recognized as a command (it is blue in color in Mathematica notebook and not black as is the case with commands Mathematica recognizes), I have tried both with and without Tad. In both cases I do not get any solution.

Please let me know how to proceed with solving the problem.

Thank you.

Best Regards,
Ayon

Hmm... wait, might it be that the off-diagonal soft-terms are treated as complex parameters? Does work?

Dear Florian,

Thanks a lot for your help and sorry for the late reply. I figured out the tadpole issue. Actually the problem was that mathematica was unable to solve some of the tadpole equations as they were in quadratic form and it was unable to invert them. I have fixed the problem by solving tadpoles for parameters which appear linearly in the equations. The other problem that I was getting though still remains. When Sarah tries to
"Writing SPheno two loop diagrammatic Higgs mass" it gives the error

SARAH dynamictwolooppoletopology: SARAH`dynamictwolooppolediagram
Part::partw: Part 1 of { } does not exist.

Is there a way to disable the two loop Higgs mass calculation in SARAH 4.8.6 which I am using?

Thank you.

Best Regards,
Ayon

Hi,

well, there is the optoin but:
1) I'm not sure if it was already available in 4.8.6
2) It might be a good idea to update SARAH to a newer version to check of the error remains
3) Turning off the 2-loop corrections might not be a good solution: those are very important in SUSY models & the error might point towards a remaining issue in the model implementation.

Cheers,
Florian

Dear Florian,

As you had suggested I am using the most recent version of SARAH and have turned off the two loop Higgs mass calculation. The model runs fine on Mathematica but when I make Model in SPheno, I am getting a lot of errors. Firstly, the input values of the vevs of the fields were declared multiple time in the file Model_data_OURMODEL.f90 generated by SARAH. It give the error message
Symbol ‘psin’ at (1) already has basic type of REAL
We fixed it by removing the multiple declarations but then got error
Observables/FlavorKit_Observables_OURMODEL.f90:46:38:
hLoc = MaxLoc(Abs(HiggsMixingMatrix(2,:)),1)
1
Error: Syntax error in argument list at (1)
I am not sure what is going wrong and how to proceed.

Thanks a lot.

Best Regards,
Ayon

Hi,

that means that you haven't defined the Higgs mixing matrix in parameters.m

Cheers,
Florian