S. Watanuki

activity

20172026

most citedTest of lepton flavor universality and search for lepton flavor violation in

B \to K ℓℓ

decays

134 citations · 892 across the 45 of their papers we have counts for

collaborators

45 papers

hep-ex2026

A search for feebly-interacting particles in $B$ decays with missing energy at Belle

Belle, Belle II Collaborations, : +406

We present a search for an invisible hidden-sector particle $X_{inv}$ , produced in $B^{0} \to D ˉ^{0} X_{inv}$ and $B^{\pm} \to h X_{inv}$ decays, where $h = π^{\pm}$ , $…

hep-ex2021★ 9 cited

Measurement of the Masses and Widths of the $Σ_{c} (2455)^{+}$ and $Σ_{c} (2520)^{+}$ Baryons

Belle Collaboration, J. Yelton, I. Adachi +205

Using 980 $fb^{- 1}$ of data {collected} with the Belle detector operating at the KEKB asymmetric-energy $e^{+} e^{-}$ collider, we report the measurements of the masses, and the f…

hep-ex2021★ 3 cited

Search for the $η_{c 2} (1 D)$ in $e^{+} e^{-} \to γ η_{c 2} (1 D)$ at $s$ near 10.6 GeV at Belle

Belle Collaboration, S. Jia, C. P. Shen +198

For the first time we search for the $η_{c 2} (1 D)$ in $e^{+} e^{-} \to γ η_{c 2} (1 D)$ at $s$ = 10.52, 10.58, and 10.867 GeV with data samples of 89.5 fb $^{- 1}$ , 711 fb $^{- 1}$ , and 121…

hep-ex2021

Evidence for the decay $Ω_{c}^{0} \to π^{+} Ω (2012)^{-} \to π^{+} (K ˉ Ξ)^{-}$

Belle Collaboration, Y. Li, S. S. Tang +190

Using a data sample of 980~fb $^{- 1}$ collected with the Belle detector operating at the KEKB asymmetric-energy $e^{+} e^{-}$ collider, we present evidence for the $Ω (2012)^{-}$ in the res…

hep-ex2021★ 3 cited

Search for the Decay $B_{s}^{0} \to η^{'} η$

Belle Collaboration, N. K. Nisar, V. Savinov +197

We report the results of the first search for the decay $B_{s}^{0} \to η^{'} η$ using $121.4 fb^{- 1}$ of data collected at the $Υ (5 S)$ resonance with the Belle dete…

hep-ex2021★ 5 cited

Measurement of branching fractions and search for $C P$ violation in $D^{0} \to π^{+} π^{-} η$ , $D^{0} \to K^{+} K^{-} η$ , and $D^{0} \to ϕ η$ at Belle

Belle Collaboration, L. K. Li, A. J. Schwartz +187

We measure the branching fractions and $C P$ asymmetries for the singly Cabibbo-suppressed decays $D^{0} \to π^{+} π^{-} η$ , $D^{0} \to K^{+} K^{-} η$ , and $D^{0} \to ϕ η$ , using 980 fb$^{-1}…

hep-ex2021★ 41 cited

Measurements of the branching fractions of the semileptonic decays $Ξ_{c}^{0} \to Ξ^{-} ℓ^{+} ν_{ℓ}$ and the asymmetry parameter of $Ξ_{c}^{0} \to Ξ^{-} π^{+}$

Belle Collaboration, Y. B. Li, C. P. Shen +182

Using data samples of 89.5 and 711 fb $^{- 1}$ recorded at energies of $s = 10.52$ and $10.58$ GeV, respectively, with the Belle detector at the KEKB $e^{+} e^{-}$ collider, we repor…

hep-ex2021★ 2 cited

Search for $B_{s}^{0} \to η^{'} X_{s s ˉ}$ at Belle using a semi-inclusive method

Belle Collaboration, S. Dubey, T. E. Browder +171

We report the first search for the penguin-dominated process $B_{s}^{0} \to η^{'} X_{s s ˉ}$ using a semi-inclusive method. A 121.4 $fb^{- 1}$ integrated lu…

hep-ex2021★ 32 cited

Measurements of Partial Branching Fractions of Inclusive $B \to X_{u} ℓ^{+} ν_{ℓ}$ Decays with Hadronic Tagging

Belle Collaboration, L. Cao, W. Sutcliffe +236

We present measurements of partial branching fractions of inclusive semileptonic $B \to X_{u} ℓ^{+} ν_{ℓ}$ decays using the full Belle data set of 711 fb $^{- 1}$ of integrate…

hep-ex2021

Measurement of Branching Fraction and Search for $C P$ Violation in $B \to ϕϕ K$

S. Mohanty, A. B. Kaliyar, V. Gaur +183

We report the measurement of branching fractions and $C P$ -violation asymmetries in $B \to ϕϕ K$ decays based on a $711 fb^{- 1}$ data sample containing $772 \times 1 0^{6}$ $B\bar{…

hep-ex2020★ 3 cited

Measurement of the Resonant and Non-Resonant Branching Ratios in $Ξ_{c}^{0} \to Ξ^{0} K^{+} K^{-}$

J. T. McNeil, J. Yelton, J. Bennett +192

Using the entire data sample of $980$ $f b^{- 1}$ integrated luminosity collected with the Belle detector at the KEKB asymmetric-energy $e^{+} e^{-}$ collider, we present an amplitude…

hep-ex2020★ 3 cited

Search for the dark photon in $B^{0} \to A^{'} A^{'}$ , $A^{'} \to e^{+} e^{-}$ , $μ^{+} μ^{-}$ , and $π^{+} π^{-}$ decays at Belle

S. -H. Park, Y. -J. Kwon, I. Adachi +216

We present a search for the dark photon $A^{'}$ in the $B^{0} \to A^{'} A^{'}$ decays, where $A^{'}$ subsequently decays to $e^{+} e^{-}$ , $μ^{+} μ^{-}$ , and $π^{+} π^{-}$ . T…

hep-ex2020★ 13 cited

Search for lepton-number- and baryon-number-violating tau decays at Belle

D. Sahoo, G. B. Mohanty, K. Trabelsi +222

We search for lepton-number- and baryon-number-violating decays $τ^{-} \to p e^{+} e^{-}$ , $p e^{-} e^{-}$ , $p e^{+} μ^{-}$ , $p e^{-} μ^{+}$ , $\overline{p}μ^…

hep-ex2020

Search for transitions from $Υ (4 S)$ and $Υ (5 S)$ to $η_{b} (1 S)$ and $η_{b} (2 S)$ with emission of an $ω$ meson

Belle Collaboration, P. Oskin, R. Mizuk +195

Using data collected in the Belle experiment at the KEKB asymmetric-energy $e^{+} e^{-}$ collider we search for transitions $Υ (4 S) \to η_{b} (1 S) ω$ , $Υ (5 S) \to η_{b} (1 S) ω$ an…

hep-ex2020★ 21 cited

Measurement of Branching Fractions of $Λ_{c}^{+} \to η Λ π^{+}$ , $η Σ^{0} π^{+}$ , $Λ (1670) π^{+}$ , and $η Σ (1385)^{+}$

J. Y. Lee, K. Tanida, Y. Kato +200

We report branching fraction measurements of four decay modes of the $Λ_{c}^{+}$ baryon, each of which includes an $η$ meson and a $Λ$ baryon in the final state, and all of which a…

hep-ex2020★ 8 cited

Search for a doubly-charged $D D K$ bound state in $Υ (1 S, 2 S)$ inclusive decays and via direct production in $e^{+} e^{-}$ collisions at $s$ = 10.520, 10.580, and 10.867 GeV

Belle Collaboration, Y. Li, S. Jia +205

We report the results of a first search for a doubly-charged $D D K$ bound state, denoted the $R^{++}$ , in $Υ (1 S)$ and $Υ (2 S)$ inclusive decays and via direct production in $e^{+} e^{-}$ …

hep-ex2020★ 99 cited

Search for Axion-Like Particles produced in $e^{+} e^{-}$ collisions at Belle II

Belle II collaboration, F. Abudinen, I. Adachi +334

We present a search for the direct production of a light pseudoscalar $a$ decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process…

hep-ex2020

Charmless $B$ decay reconstruction in 2019 Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +533

We report on the reconstruction of various charmless $B$ decays from electron-positron collisions at the energy corresponding to the $Υ (4 S)$ resonance collected with the Belle II d…

hep-ex2020

Measurement of the branching fraction $B (B ˉ^{0} \to D^{*+} ℓ^{-} ν ˉ_{ℓ})$ with early Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +533

We measure the branching fractions for the decays $B ˉ^{0} \to D^{*+} e^{-} ν ˉ_{e}$ and $B ˉ^{0} \to D^{*+} μ^{-} ν ˉ_{μ}$ using $8.70 \pm 0.09 fb^{- 1}$ of data collecte…

hep-ex2020★ 5 cited

First search for the $η_{c 2} (1 D)$ in $B$ decays at Belle

Belle Collaboration, K. Chilikin, I. Adachi +194

The first dedicated search for the $η_{c 2} (1 D)$ is carried out using the decays $B^{+} \to η_{c 2} (1 D) K^{+}$ , $B^{0} \to η_{c 2} (1 D) K_{S}^{0}$ , $B^0 \rightarrow η_{c2}(1D) π^…

hep-ex2020★ 10 cited

Update of inclusive cross sections of single and pairs of identified light charged hadrons

R. Seidl, I. Adachi, H. Aihara +133

We report new measurements of the production cross sections of pairs of charged pions and kaons as a function of their fractional energies using various fractional-energy definitio…

hep-ex2019★ 44 cited

Search for $B^{+} \to μ^{+} ν_{μ}$ and $B^{+} \to μ^{+} N$ with inclusive tagging

M. T. Prim, F. U. Bernlochner, P. Goldenzweig +191

We report the result for a search for the leptonic decay of $B^{+} \to μ^{+} ν_{μ}$ using the full Belle data set of 711 fb $^{- 1}$ of integrated luminosity at the $Υ (4 S)$ resonance.…

hep-ex2019★ 7 cited

Observation of $τ^{-} \to π^{-} ν_{τ} e^{+} e^{-}$ and search for $τ^{-} \to π^{-} ν_{τ} μ^{+} μ^{-}$

Belle Collaboration, Y. Jin, H. Aihara +195

We present the first measurements of branching fractions of rare tau-lepton decays, $τ^{-} \to π^{-} ν_{τ} ℓ^{+} ℓ^{-}$ ( $ℓ = e$ or $μ$ ), using a data sample corresponding t…

hep-ex2019★ 11 cited

First measurement of the CKM angle $ϕ_{3}$ with $B^{\pm} \to D (K_{S}^{0} π^{+} π^{-} π^{0}) K^{\pm}$ decays

Belle Collaboration, P. K. Resmi, J. Libby +165

We present the first model-independent measurement of the CKM unitarity triangle angle $ϕ_{3}$ using $B^{\pm} \to D (K_{S}^{0} π^{+} π^{-} π^{0}) K^{\pm}$ decays, where $D$ indicates either a…

A search for feebly-interacting particles in B decays with missing energy at Belle

Measurement of the Masses and Widths of the Σc​(2455)+ and Σc​(2520)+ Baryons

Search for the ηc2​(1D) in e+e−→γηc2​(1D) at s​ near 10.6 GeV at Belle

Evidence for the decay Ωc0​→π+Ω(2012)−→π+(KˉΞ)−

Search for the Decay Bs0​→η′η

Measurement of branching fractions and search for CP violation in D0→π+π−η, D0→K+K−η, and D0→ϕη at Belle

Measurements of the branching fractions of the semileptonic decays Ξc0​→Ξ−ℓ+νℓ​ and the asymmetry parameter of Ξc0​→Ξ−π+

Search for Bs0​→η′Xssˉ​ at Belle using a semi-inclusive method

Measurements of Partial Branching Fractions of Inclusive B→Xu​ℓ+νℓ​ Decays with Hadronic Tagging

Measurement of Branching Fraction and Search for CP Violation in B→ϕϕK

Measurement of the Resonant and Non-Resonant Branching Ratios in Ξc0​→Ξ0K+K−

Search for the dark photon in B0→A′A′, A′→e+e−, μ+μ−, and π+π− decays at Belle

Search for lepton-number- and baryon-number-violating tau decays at Belle

Search for transitions from Υ(4S) and Υ(5S) to ηb​(1S) and ηb​(2S) with emission of an ω meson

Measurement of Branching Fractions of Λc+​→ηΛπ+, ηΣ0π+, Λ(1670)π+, and ηΣ(1385)+

Search for a doubly-charged DDK bound state in Υ(1S,2S) inclusive decays and via direct production in e+e− collisions at s​ = 10.520, 10.580, and 10.867 GeV

Search for Axion-Like Particles produced in e+e− collisions at Belle II

Charmless B decay reconstruction in 2019 Belle II data

Measurement of the branching fraction B(Bˉ0→D∗+ℓ−νˉℓ​) with early Belle II data

First search for the ηc2​(1D) in B decays at Belle

Update of inclusive cross sections of single and pairs of identified light charged hadrons

Search for B+→μ+νμ​ and B+→μ+N with inclusive tagging

Observation of τ−→π−ντ​e+e− and search for τ−→π−ντ​μ+μ−

First measurement of the CKM angle ϕ3​ with B±→D(KS0​π+π−π0)K± decays

A search for feebly-interacting particles in $B$ decays with missing energy at Belle

Measurement of the Masses and Widths of the $Σ_{c} (2455)^{+}$ and $Σ_{c} (2520)^{+}$ Baryons

Search for the $η_{c 2} (1 D)$ in $e^{+} e^{-} \to γ η_{c 2} (1 D)$ at $s$ near 10.6 GeV at Belle

Evidence for the decay $Ω_{c}^{0} \to π^{+} Ω (2012)^{-} \to π^{+} (K ˉ Ξ)^{-}$

Search for the Decay $B_{s}^{0} \to η^{'} η$

Measurement of branching fractions and search for $C P$ violation in $D^{0} \to π^{+} π^{-} η$ , $D^{0} \to K^{+} K^{-} η$ , and $D^{0} \to ϕ η$ at Belle

Measurements of the branching fractions of the semileptonic decays $Ξ_{c}^{0} \to Ξ^{-} ℓ^{+} ν_{ℓ}$ and the asymmetry parameter of $Ξ_{c}^{0} \to Ξ^{-} π^{+}$

Search for $B_{s}^{0} \to η^{'} X_{s s ˉ}$ at Belle using a semi-inclusive method

Measurements of Partial Branching Fractions of Inclusive $B \to X_{u} ℓ^{+} ν_{ℓ}$ Decays with Hadronic Tagging

Measurement of Branching Fraction and Search for $C P$ Violation in $B \to ϕϕ K$

Measurement of the Resonant and Non-Resonant Branching Ratios in $Ξ_{c}^{0} \to Ξ^{0} K^{+} K^{-}$

Search for the dark photon in $B^{0} \to A^{'} A^{'}$ , $A^{'} \to e^{+} e^{-}$ , $μ^{+} μ^{-}$ , and $π^{+} π^{-}$ decays at Belle

Search for transitions from $Υ (4 S)$ and $Υ (5 S)$ to $η_{b} (1 S)$ and $η_{b} (2 S)$ with emission of an $ω$ meson

Measurement of Branching Fractions of $Λ_{c}^{+} \to η Λ π^{+}$ , $η Σ^{0} π^{+}$ , $Λ (1670) π^{+}$ , and $η Σ (1385)^{+}$

Search for a doubly-charged $D D K$ bound state in $Υ (1 S, 2 S)$ inclusive decays and via direct production in $e^{+} e^{-}$ collisions at $s$ = 10.520, 10.580, and 10.867 GeV

Search for Axion-Like Particles produced in $e^{+} e^{-}$ collisions at Belle II

Charmless $B$ decay reconstruction in 2019 Belle II data

Measurement of the branching fraction $B (B ˉ^{0} \to D^{*+} ℓ^{-} ν ˉ_{ℓ})$ with early Belle II data

First search for the $η_{c 2} (1 D)$ in $B$ decays at Belle

Search for $B^{+} \to μ^{+} ν_{μ}$ and $B^{+} \to μ^{+} N$ with inclusive tagging

Observation of $τ^{-} \to π^{-} ν_{τ} e^{+} e^{-}$ and search for $τ^{-} \to π^{-} ν_{τ} μ^{+} μ^{-}$

First measurement of the CKM angle $ϕ_{3}$ with $B^{\pm} \to D (K_{S}^{0} π^{+} π^{-} π^{0}) K^{\pm}$ decays