Challenges in Semileptonic B Decays

Kolya and New results on inclusive $V_{cb}$ using $q^2$, $E_\ell$ and $M_X$ spectral moments

25 Sept 2024, 13:30

30m

Heavy to heavy inclusive

Speaker

Keri Vos (Nikhef National institute for subatomic physics (NL))

Description

We present a new global fit for inclusive $V_{cb}$ decays based on the Kolya open-source library, utilizing the full available set of spectral moments of semileptonic $B\to X_c \ell \nu$ decays with state-of-the-art precision. Our approach includes a novel prescription to estimate the uncertainty arising from missing higher-order contributions of order $1/m_b^4$ in the heavy quark expansion (HQE). We review various approaches on how to incorporate theoretical uncertainties and correlations, studying their impact on the value of inclusive $V_{cb}$ and HQE parameters.

Presentation materials

2024_Vienna_Kolya.pdf