K. Tanida

Search for the lepton-flavor-violating τ− → e∓ℓ±ℓ− decays at Belle II

I. Adachi, L. Aggarwal, H. Ahmed, Y. H. Ahn et autres

A bstract We present the result of a search for the charged-lepton-flavor violating decays τ − → e ∓ ℓ ± ℓ − , where ℓ is a muon or an electron, using a data sample with an integrated luminosity of 428 …

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Search for lepton-flavor-violating $τ^- \to \ell^- K_s^0$ decays at Belle and Belle II

Belle Collaborations, I. Adachi, L. Aggarwal, H. Ahmed et autres

We present the results of a search for charged-lepton-flavor violating decays $τ^{-} \rightarrow \ell^{-}K_{S}^{0}$, where $\ell^{-}$ is either an electron or a muon. We combine $e^+e^-$ data samples recorded by the Belle II experiment at the SuperKEKB collider (428 fb$^{-1}$) with samples …

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

H. Aihara, M. Alhakami, N. Anh Ky, N. K. Baghel et autres

We present a search for the rare flavor-changing neutral-current decay $B^0 \to K^{\ast 0} τ^+ τ^-$ with data collected by the Belle II experiment at the SuperKEKB electron-positron collider. The analysis uses a 365 fb$^{-1}$ data sample recorded at the center-of-mass energy …

Observation of $e^+e^-\to \eta \Upsilon(2S)$ and search for $e^+e^-\to \eta \Upsilon(1S), \gamma X_b$ at $\sqrt{s}$ near 10.75 GeV

I. Adachi, L. Aggarwal, H. Ahmed, Y. H. Ahn et autres

We present an analysis of the processes $e^{+}e^{-}\toηΥ(1S)$, $ηΥ(2S)$, and $γX_b$ with $X_b\toπ^+π^-χ_{bJ},~χ_{bJ}\toγΥ(1S)$ $(J=1,~2)$ reconstructed from $γγπ^+π^-\ell^+\ell^-~(\ell=e,~μ)$ final states in $19.6\rm~\rm fb^{-1}$ of Belle II data collected at four energy points near the peak of the $Υ(10753)$ resonance. Here, $X_b$ is a …

Search for the decay $B^{0}\rightarrow K^{\ast 0}\tau^{+}\tau^{-}$ at the Belle experiment

T. V. Dong, T. Luo, I. Adachi, H. Aihara et autres

This letter presents a search for the rare flavor-changing neutral current process $B^{0}\rightarrow K^{\ast 0}\tau^{+}\tau^{-}$ using data taken with the Belle detector at the KEKB asymmetric energy $e^{+}e^{-}$ collider. The analysis is based on the entire $\Upsilon(4S)$ resonance data sample of 711 …

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