g-2 in SPheno

[Anders]

Hi,

Does somebody know how to interpret the value of the anomalous magnetic momenta listed in SPheno spectrum files? For example, running the SM implementation in SARAH produces the following line for muon g-2:

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21    2.07281881E-14  # (g-2)_mu

This is many orders of magnitude too small to be the SM value of muon g-2. Could it be the difference between some tabulated SM value and the SPheno-computed value? If so, what is the SM value used?

Best regards,
Anders

[porod]

Hi,

only the BSM contributions are calculated (at the 1-loop level), the SM-part is not calculated at all. Thus, this is indeed the difference with respect to the SM without giving a specific SM value.

Best, Werner

[Anders]

I see, thank you!