K. Hayasaka

activity

20232025

collaborators

3 papers

hep-ex2025

Search for $B^{0} \to K^{* 0} τ^{+} τ^{-}$ decays at the Belle II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +446

We present a search for the rare flavor-changing neutral-current decay $B^{0} \to K^{* 0} τ^{+} τ^{-}$ with data collected by the Belle II experiment at the SuperKEKB electron-positro…

hep-ex2024

Measurement of $B \to K^{*} (892) γ$ decays at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +451

We present measurements of $B \to K^{*} (892) γ$ decays using $365 fb^{- 1}$ of data collected from 2019 to 2022 by the Belle~II experiment at the SuperKEKB asymmetric-energy…

hep-ex2023

Measurement of the Ratio of Partial Branching Fractions of Inclusive $B \to X_{u} ℓ ν$ to $B \to X_{c} ℓ ν$ and the Ratio of their Spectra with Hadronic Tagging

Belle Collaboration, M. Hohmann, P. Urquijo +157

We present a measurement of the ratio of partial branching fractions of the semi-leptonic inclusive decays, $B \to X_{u} ℓ ν$ to $\overline{B} \to X_{c} \ell…

Search for B0→K∗0τ+τ− decays at the Belle II experiment

Measurement of B→K∗(892)γ decays at Belle II

Measurement of the Ratio of Partial Branching Fractions of Inclusive B→Xu​ℓν to B→Xc​ℓν and the Ratio of their Spectra with Hadronic Tagging

Search for $B^{0} \to K^{* 0} τ^{+} τ^{-}$ decays at the Belle II experiment

Measurement of $B \to K^{*} (892) γ$ decays at Belle II

Measurement of the Ratio of Partial Branching Fractions of Inclusive $B \to X_{u} ℓ ν$ to $B \to X_{c} ℓ ν$ and the Ratio of their Spectra with Hadronic Tagging