Inquiry related to NEW PHYSICS contribution using the command: flavio.np_prediction

[avirupshaw]

Dear Sir,

My Simple inquiry is given below

Suppose I am working on a new physics scenario and trying to calculate a particular flavour physics observable in that scenario. For that observable I have calculated the new physics contribution to the Wilson Coefficient required for that observable.

So the total contribution (new physics + SM) to the Wilson coefficient would be: WC_SM+ WC_NP.

Therefore, My question is when I use the command flavio.np_prediction, it calculates the observable considering the contribution WC_NP only, then to evaluate the total value from that new physics scenario I need to add the SM contribution.

Or for this command flavio.np_prediction I need to put the Wilson coefficient as WC_SM+ WC_NP.

Or in short specifically:

for new physics prediction including SM contribution for a particular observable, we should use Wilson coefficients as WC_NP (New Physics Contribution generated by new physics parameters) only or (WC_SM+ WC_NP).

I would greatly appreciate your clarification on this matter.

With Best Regards

[peterstangl]

The convention used in flavio is that any Wilson coefficient provided by the user should only contain new physics contributions, i.e. these Wilson coefficients should be zero in the absence of new physics. But in any case, the theory predictions will always contain the Standard Model contributions. So if you use flavio.np_prediction and provide Wilson coefficients that are zero, you will reproduce the result of flavio.sm_prediction.

[avirupshaw]

Thank you very much for the explanation.