I. Nakamura

Determination of $|V_{ub}|$ from untagged $B^0\toπ^- \ell^+ ν_{\ell}$ decays using 2019-2021 Belle II data

Belle II Collaboration, K. Adamczyk, L. Aggarwal, P. Ahlburg et autres

We present an analysis of the charmless semileptonic decay $B^0\toπ^- \ell^+ ν_{\ell}$, where $\ell = e, μ$, from 198.0 million pairs of $B\bar{B}$ mesons recorded by the Belle II detector at the SuperKEKB electron-positron collider. The decay is reconstructed without identifying the …

A calibration of the Belle II hadronic tag-side reconstruction algorithm with $B \rightarrow X\ell \nu$ decays

F. Abudinén, I. Adachi, R. Adak, K. Adamczyk et autres

Tag-side reconstruction is an important method for reconstructing $B$ meson decays with missing energy. The Belle II tag-side reconstruction algorithm, Full Event Interpretation, relies on a hierarchical reconstruction of $B$ meson decays with multivariate classification employed at each stage of reconstruction. Given …

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Publisher’s Note: Improved measurement of CP -violation parameters sin2ϕ1 and |λ| , B meson lifetimes, and B0−B¯0 mixing parameter Δmd [Phys. Rev. D71, 072003 (2005) ]

K. Abe, I. Adachi, H. Aihara, M. Akatsu et autres

We present a precise measurement of the standard model CP -violation parameter sin 2φ 1 , the direct CP violation parameter |λ|, the lifetimes of charged and neutral B mesons and their ratio, and the B 0 -B 0 mixing parameter ∆m …

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