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Current Status of the Standard Model Prediction for the B_s -> mu^+ mu^- Branching Ratio

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arxiv 2407.03810 v1 pith:VMPF6B3D submitted 2024-07-04 hep-ph

Current Status of the Standard Model Prediction for the B_s -> mu^+ mu^- Branching Ratio

classification hep-ph
keywords modelpredictionstandardbranchingratioagreementamountsassociated
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The rare decay B_s -> mu^+ mu^- provides an important constraint on possible deviations from the Standard Model in b-s-l-l interactions. The present weighted average of its branching ratio measurements amounts to (3.34 \pm 0.27) x 10^-9, which remains in good agreement with the theoretical prediction of (3.64 \pm 0.12) x 10^-9 within the Standard Model. In the present paper, we review calculations that have contributed to this prediction, and discuss the associated uncertainties.

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