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added pointer to todays’s outlook for Belle II to confirm the flavour anomalies, if they are real:
With $[$ … $]$ Belle II, we are at the brink of a new era in quark flavour physics $[...]$ we present a phenomenological study of the potential for Belle II to reveal possible new physics in the inclusive decay channel
(p. 15:) We see that anomalies in the exclusive sector can be confirmed at the 5σ level by inclusive measurements if the true values of $C_{9,10}^{\mu NP}$ are at the current best-fit point of the exclusive fits
(p. 16:) After including $B_s \to \mu^+ \mu_-$, the reach in the $[C_9^{\mu NP}, C_{10}^{\mu NP}]$ plane improves considerably. Exclusive anomalies could be confirmed at the 6σ level.
(p. 20:) Should the true value of $C_9^{NP}$ and $C_{10}^{NP}$ be at the current best-fit points of the global fits, an analysis of inclusive $\bar B_ \to X_s \ell^+ \ell^-$ at Belle II with $50 ab^{-1}$ of data will exclude the SM point $C_9^{NP} = C_{10}^{NP} = 0$ at the level of $\sim 5$σ. This again underlines the necessity of a full angular analysis of $\bar B_ \to X_s \ell^+ \ell^-$ at Belle II.
added pointer to today’s
Belle II Executive Summary [arXiv:2203.10203]
Snowmass White Paper: Belle II physics reach and plans for the next decade and beyond [arXiv:2207.06307]
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