Phenomenology of inclusive $\bar{B}\to X_s{\ell }^{+}{\ell }^{-}$ for the Belle II era

Abstract

With the first data being recorded at Belle II, we are at the brink of a new era in quark flavour physics. The many exciting new opportunities for Belle~II include a full angular analysis of inclusive $\bar{B}\to X_s{\ell }^{+}{\ell }^{-}$ which has the potential to reveal new physics, in particular by its interplay with the exclusive $b\to s{\ell }^{+}{\ell }^{-}$ counterparts studied extensively at LHCb. In this paper, we present fully updated Standard Model predictions for all angular observables necessary for this endeavour. These predictions are tailored to Belle II and include an elaborate study of the treatment of collinear photons which become crucial when aiming for the highest precision. In addition, we present a phenomenological study of the potential for Belle II to reveal possible new physics in the inclusive decay channel, both in an independent manner and in combination with exclusive modes.

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Cited by in corpus (10)

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• QED in $\bar{B}\to \bar{K}{\ell }^{+}{\ell }^{-}$ LFU ratios: Theory versus Experiment, a Monte Carlo Study
• $B\to D\ell {\nu }_{\ell }$ form factors beyond leading power and extraction of $|V_{cb}|$ and $R(D)$
• Third order correction to semileptonic $b\to u$ decay: fermionic contributions
• Electroweak Penguin Decays of $b$-Flavoured Hadrons
• Data-driven analyses and model-independent fits for present $b\to s\ell \ell$ results
• Isospin extrapolation as a method to study inclusive $\bar{B}\to X_s{\ell }^{+}{\ell }^{-}$ decays
• Renormalisation group evolution of the shape function $g_{17}$ in $\bar{B}\to X_s\gamma$ and $\bar{B}\to X_s{\ell }^{+}{\ell }^{-}$ at subleading power
• Charming Darwin: the evolution of QCD parameters across different species