Hi Florian, it seems that there is some kind of misunderstanding in what you and I refer to as C7,..,C10 Wilson coefficients. I was talking about the conventional basis for b physics which can be found here: https://wcxf.github.io/assets/pdf/WET.flavio.pdf The C7 coefficient corresponds to the magne...

Hi Florian, shoudn't you include the photonic contributions for processes like b -> s l l ? For example, the decay B -> K mu+ mu- would require the coefficients C7, C9 and C10 and from your routine one would miss the photon contribution to the vector operator corresponding to C9. Sincerely, SoundSon...

Hello Florian, while going through the calculation of the C9 Wilson coefficient, I noticed that there are no photonic penguin contributions in the subroutine CalculatePengV2d2L. I know that FlavorKit calculates b -> s gamma and from there one can easily construct the photonic penguin contribution, b...

Hi Florian, thanks for appreciating my comment :) Can you tell me in which basis SPheno works, when generation mixing is turned on? I first thought it takes the input in the SuperCKM basis, but then i saw this SCKM flag in the settings so i don't know for sure how the squark mass matrices are evalua...

Hi Florian,

this reordering seems to be rather unconventional to me.
Can you please check your old notes for the reason because i can not think of
any cause for this.

Best regards,
SoundSonic1

Hey Florian, can you please check why the current SPheno version calculates a different coeffC8sm opposed to this one https://raw.githubusercontent.com/flav-io/flavio/master/flavio/data/test/SPheno.spc.MSSM ? Btw this switch to SuperCKM basis does not work for the MSSM. There are some divisions by z...

Hi Avelino, ok i didn't know they are not turned on in WCxf by default. The coeffC8 value is calculated in the spectrum file which should correspond to Q2R_23, so i don't see a reason why it shouldn't be exported by default. Anyway, i want to know why the calculation of coeff8 has changed in SPheno....

Hi Florian, i have looked into an older spectrum file taken from the flavio website: https://raw.githubusercontent.com/flav-io/flavio/master/flavio/data/test/SPheno.spc.MSSM In the old version, the coeff8sm is correctly calculated. You can see coeff8sm = -0.86377623E-09 vs 0.16439750E-10 from the cu...

Hi Avelino,

they are zero :/
You can have a look at my files:

https://pastebin.com/PTZk2ATv SPheno.spc.THDMII
https://pastebin.com/DFurKQeH WC.THDMII_1.json

Hi, @Staub it seems like flav-io and the paper i referred to use the same basis. Is it possible to output the Wilson Coefficients of flav-io? On a different note: i was able to confirm coeffC7sm using the steps i mentioned in the first post. @Avelino The json files from SPheno/FlavorKit contain only...