NNLO QCD corrections to ΔΓ_s in the B_s-B_s system

Marvin Gerlach,Ulrich Nierste, Pascal Reeck, Vladyslav Shtabovenko,Matthias Steinhauser

arxiv（2024）

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摘要

This report summarises recent advances made in the calculation of the NNLO QCD corrections to the width difference ΔΓ_s in the B_s-B_s system. The inclusion of the effects due to current-current operators leads to an updated prediction of ΔΓ_s = (0.076± 0.017) ps^-1, which narrows the gap between theory and experiment.

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