H.-J. Kim

Study of $χ_{bJ}(nP) \rightarrow ωΥ(1S)$ at Belle

A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara et autres

We report results from a study of hadronic transitions of the $χ_{bJ}(nP)$ states of bottomonium at Belle. The $P$-wave states are reconstructed in transitions to the $Υ(1S)$ with the emission of an $ω$ meson. The transitions of the $n=2$ triplet states provide …

Test of lepton flavor universality in $B \to K \ell^{+}\ell^{-}$ decays

A. Abdesselam, I. Adachi, V. Aulchenko, D. Greenwald et autres

We present measurements of the branching fractions for the decays $B\to K \mu^{+}\mu^{-}$ and $B\to K e^{+}e^{-}$, and their ratio ($R_{K}$), using a data sample of 711 $fb^{-1}$ that contains $772 \times 10^{6}$ $B\bar{B}$ events. The data were collected at the $\Upsilon(4S)$ …

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