S. Okuno

activity

20002023

most citedObservation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays

2k citations · 24.7k across the 344 of their papers we have counts for

collaborators

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337 papers · 1 filter

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-ex2020★ 6 cited

Measurement of two-particle correlations in hadronic $e^{+} e^{-}$ collisions at Belle

Belle Collaboration, A. Abdesselam, I. Adachi +459

The enhancement of charged-particle pairs with large pseudorapidity difference and small azimuthal angle difference, often referred to as the ``ridge signal'', is a phenomenon wide…

hep-ex2020★ 5 cited

Search for $B^{0}$ Decays to Invisible Final States ( $+ γ$ ) at Belle

Belle Collaboration, Y. Ku, P. Chang +153

We report searches for $B^{0} \to invisible$ and $B^{0} \to invisible + γ$ decays, where the energy of the photon is required to be larger than 0.5 GeV. These results are obtained…

hep-ex2019★ 236 cited

Measurement of $R (D)$ and $R (D^{*})$ with a semileptonic tagging method

The Belle Collaboration, G. Caria, P. Urquijo +188

The experimental results on the ratios of branching fractions $R (D) = B (B ˉ \to D τ^{-} ν ˉ_{τ}) / B (B ˉ \to D ℓ^{-} ν ˉ_{ℓ})$ and $\mathcal{R}(D^…

hep-ex2019

Experimental determination of the isospin of $Λ_{c} (2765)^{+} / Σ_{c} (2765)^{+}$

The Belle Collaboration, A. Abdesselam, I. Adachi +454

We report an experimental determination of the isospin of $Λ_{c} (2765)^{+} / Σ_{c} (2765)^{+}$ using 980 fb $^{- 1}$ data in the $e^{+} e^{-}$ annihilation around $s = 10.6$ GeV collected by…

hep-ex2019★ 134 cited

Test of lepton flavor universality and search for lepton flavor violation in $B \to K ℓℓ$ decays

S. Choudhury, S. Sandilya, K. Trabelsi +220

We present measurements of the branching fractions for the decays $B \to K μ^{+} μ^{-}$ and $B \to K e^{+} e^{-}$ , and their ratio ( $R_{K}$ ), using a data sample of 711 $f b^{- 1}$ that…

hep-ex2019★ 68 cited

Measurement of $R (D)$ and $R (D^{*})$ with a semileptonic tagging method

The Belle Collaboration, A. Abdesselam, I. Adachi +461

We report a measurement of the ratios of branching fractions $R (D) = B (B ˉ \to D τ^{-} ν ˉ_{τ}) / B (B ˉ \to D ℓ^{-} ν ˉ_{ℓ})$ and $\mathcal{R}(D^{…

hep-ex2019★ 170 cited

Test of lepton-flavor universality in $B \to K^{*} ℓ^{+} ℓ^{-}$ decays at Belle

Belle Collaboration, S. Wehle, I. Adachi +179

We present a measurement of $R_{K^{*}}$ , the branching fraction ratio $B (B \to K^{*} μ^{+} μ^{-})$ / $B (B \to K^{*} e^{+} e^{-})$ , for both charged and neutral $B$ meso…

hep-ex2019★ 35 cited

Measurement of the $D^{-}$ polarization in the decay $B^{0} \to D^{-} τ^{+} ν_{τ}$

Belle Collaboration, A. Abdesselam, I. Adachi +457

We report the first measurement of the $D^{*-}$ meson polarization in the decay $B^{0} \to D^{*-} τ^{+} ν_{τ}$ using the full data sample of 772 $\times 1 0^{6}$ $B B ˉ$ pairs recorded…

hep-ex2018★ 112 cited

Measurement of the CKM Matrix Element $∣ V_{c b} ∣$ from $B^{0} \to D^{*-} ℓ^{+} ν_{ℓ}$ at Belle

E. Waheed, P. Urquijo, I. Adachi +184

We present a new measurement of the CKM matrix element $∣ V_{c b} ∣$ from $B^{0} \to D^{*-} ℓ^{+} ν_{ℓ}$ decays, reconstructed with the full Belle data set of $711 f b^{- 1}$ i…

hep-ex2018★ 66 cited

Observation of Transverse $Λ/ Λ ˉ$ Hyperon Polarization in $e^{+} e^{-}$ Annihilation at Belle

Belle Collaboration, Y. Guan, A. Vossen +205

We report the first observation of the spontaneous polarization of $Λ$ and $Λ ˉ$ hyperons transverse to the production plane in $e^{+} e^{-}$ annihilation, which is attributed to the…

hep-ex2018

Study of charmless decays $B^{\pm} \to K_{S}^{0} K_{S}^{0} h^{\pm}$ ( $h = K, π$ ) at Belle

The Belle Collaboration, A. Abdesselam, I. Adachi +449

We report a search for charmless hadronic decays of charged $B$ mesons to the final states $K_{S}^{0} K_{S}^{0} K^{\pm}$ and $K_{S}^{0} K_{S}^{0} π^{\pm}$ . The results are based o…

hep-ex2018★ 5 cited

Observation of $B^{+} \to p Λ ˉ K^{+} K^{-}$ and $B^{+} \to p ˉ Λ K^{+} K^{+}$

P. -C. Lu, M. -Z. Wang, R. Chistov +200

We report the study of \OK \ and \SK \ using a $772 \times 1 0^{6}$ $B B ˉ$ pair data sample recorded on the $Υ (4S)$ resonance with the Belle detector at KEKB. The following…

hep-ex2018★ 1 cited

Measurements of branching fraction and $C P$ asymmetry of the $B ˉ^{0} (B^{0}) \to K_{S}^{0} K^{\mp} π^{\pm}$ decay at Belle

A. Abdesselam, I. Adachi, K. Adamczyk +446

We report the measurement of the branching fraction and $C P$ asymmetry for the $B ˉ^{0} (B^{0}) \to K_{S}^{0} K^{\mp} π^{\pm}$ decay. The analysis is performed on a data sample of…

hep-ex2018★ 21 cited

Measurements of isospin asymmetry and difference of direct $C P$ asymmetries in inclusive $B \to X_{s} γ$ decays

S. Watanuki, A. Ishikawa, I. Adachi +174

We report measurements of isospin asymmetry $Δ_{0 -}$ and difference of direct $C P$ asymmetries $Δ A_{C P}$ between charged and neutral $B \to X_{s} γ$ decays. This analysis is based on…

hep-ex2018★ 5 cited

Observation of $Υ (2 S) \to γ η_{b} (1 S)$ decay

Belle Collaboration, B. G. Fulsom, T. K. Pedlar +196

We report the observation of $Υ (2 S) \to γ η_{b} (1 S)$ decay based on analysis of the inclusive photon spectrum of $24.7$ fb $^{- 1}$ of $e^{+} e^{-}$ collisions at the $Υ (2 S)$ center-of-mass…

hep-ex2018★ 3 cited

Search for $Υ (1 S, 2 S) \to Z_{c}^{+} Z_{c}^{(') -}$ and $e^{+} e^{-} \to Z_{c}^{+} Z_{c}^{(') -}$ at $s$ = 10.52, 10.58, and 10.867 GeV

Belle Collaboration, S. Jia, C. P. Shen +177

The first search for $Z_{c}$ pair production in $Υ (1 S)$ and $Υ (2 S)$ decays and in $e^{+} e^{-}$ annihilation at $s$ = 10.52, 10.58, and 10.867 GeV is conducted using data col…

hep-ex2018★ 30 cited

Evidence of a structure in $K ˉ^{0} Λ_{c}^{+}$ consistent with a charged $Ξ_{c} (2930)^{+}$ , and updated measurement of $B ˉ^{0} \to K ˉ^{0} Λ_{c}^{+} Λ ˉ_{c}^{-}$ at Belle

Belle Collaboration, Y. B. Li, C. P. Shen +175

We report evidence for the charged charmed-strange baryon $Ξ_{c} (2930)^{+}$ with a signal significance of 3.9 $σ$ with systematic errors included. The charged $Ξ_{c} (2930)^{+}$ is found…

hep-ex2018★ 6 cited

Measurement of eta_c(1S), eta_c(2S) and non-resonant eta' pi+ pi- production via two-photon collisions

The Belle Collaboration, Q. N. Xu, I. Adachi +176

We report the measurement of gamma gamma to eta_c(1S), eta_c(2S) to eta' pi+ pi- with eta' decays to gamma rho and eta pi+ pi- using 941 fb^{-1} of data collected with the Belle de…

hep-ex2018★ 3 cited

Inclusive study of bottomonium production in association with an $η$ meson in $e^{+} e^{-}$ annihilations near $Υ (5 S)$

Belle Collaboration, U. Tamponi, E. Guido +173

We study bottomonium production in association with an $η$ meson in $e^{+} e^{-}$ annihilations near the $Υ (5 S)$ , at a center of mass energy of $s = 10.866$ GeV. The results are b…

hep-ex2018★ 7 cited

Measurement of the Decays $Λ_{c} \to Σ π π$ at Belle

Belle Collaboration, M. Berger, C. Schwanda +196

We report measurements of the branching fractions of the decays $Λ_{c}^{+} \to Σ^{+} π^{-} π^{+}$ , $Λ_{c}^{+} \to Σ^{0} π^{+} π^{0}$ and $Λ_{c}^{+} \to Σ^{+} π^{0} π^{0}$ relative to the reference channel $Λ^+_c\to pK^-π^+…

hep-ex2018★ 13 cited

Measurement of Branching Fractions of Hadronic Decays of the $Ω_{c}^{0}$ Baryon

Belle Collaboration, J. Yelton, I. Adachi +186

Using a data sample of 980 $fb^{- 1}$ of $e^{+} e^{-}$ annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy $e^{+} e^{-}$ collider, we report the resu…

hep-ex2017★ 21 cited

Search for $B^{-} \to μ^{-} ν ˉ_{μ}$ Decays at the Belle Experiment

Belle Collaboration, A. Sibidanov, K. E. Varvell +184

We report the result of a search for the decay $B^{-} \to μ^{-} ν ˉ_{μ}$ . The signal events are selected based on the presence of a high momentum muon and the topology of the rest of…

hep-ex2017★ 10 cited

Study of $K_{S}^{0}$ pair production in single-tag two-photon collisions

Belle Collaboration, M. Masuda, S. Uehara +185

We report a measurement of the cross section for $K_{S}^{0}$ pair production in single-tag two-photon collisions, $γ^{*} γ \to K_{S}^{0} K_{S}^{0}$ , for $Q^{2}$ up to 30 GeV $^{2}$ , where $Q^{2}$ is the…

Search for the Decay Bs0​→η′η

Measurement of two-particle correlations in hadronic e+e− collisions at Belle

Search for B0 Decays to Invisible Final States (+γ) at Belle

Measurement of R(D) and R(D∗) with a semileptonic tagging method

Experimental determination of the isospin of Λc​(2765)+/Σc​(2765)+

Test of lepton flavor universality and search for lepton flavor violation in B→Kℓℓ decays

Measurement of R(D) and R(D∗) with a semileptonic tagging method

Test of lepton-flavor universality in B→K∗ℓ+ℓ− decays at Belle

Measurement of the D∗− polarization in the decay B0→D∗−τ+ντ​

Measurement of the CKM Matrix Element ∣Vcb​∣ from B0→D∗−ℓ+νℓ​ at Belle

Observation of Transverse Λ/Λˉ Hyperon Polarization in e+e− Annihilation at Belle

Study of charmless decays B±→KS0​KS0​h± (h=K,π) at Belle

Observation of B+→pΛˉK+K− and B+→pˉ​ΛK+K+

Measurements of branching fraction and CP asymmetry of the Bˉ0(B0)→KS0​K∓π± decay at Belle

Measurements of isospin asymmetry and difference of direct CP asymmetries in inclusive B→Xs​γ decays

Observation of Υ(2S)→γηb​(1S) decay

Search for Υ(1S,2S)→Zc+​Zc(′)−​ and e+e−→Zc+​Zc(′)−​ at s​ = 10.52, 10.58, and 10.867 GeV

Evidence of a structure in Kˉ0Λc+​ consistent with a charged Ξc​(2930)+, and updated measurement of Bˉ0→Kˉ0Λc+​Λˉc−​ at Belle

Measurement of eta_c(1S), eta_c(2S) and non-resonant eta' pi+ pi- production via two-photon collisions

Inclusive study of bottomonium production in association with an η meson in e+e− annihilations near Υ(5S)

Measurement of the Decays Λc​→Σππ at Belle

Measurement of Branching Fractions of Hadronic Decays of the Ωc0​ Baryon

Search for B−→μ−νˉμ​ Decays at the Belle Experiment

Study of KS0​ pair production in single-tag two-photon collisions

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

Measurement of two-particle correlations in hadronic $e^{+} e^{-}$ collisions at Belle

Search for $B^{0}$ Decays to Invisible Final States ( $+ γ$ ) at Belle

Measurement of $R (D)$ and $R (D^{*})$ with a semileptonic tagging method

Experimental determination of the isospin of $Λ_{c} (2765)^{+} / Σ_{c} (2765)^{+}$

Test of lepton flavor universality and search for lepton flavor violation in $B \to K ℓℓ$ decays

Measurement of $R (D)$ and $R (D^{*})$ with a semileptonic tagging method

Test of lepton-flavor universality in $B \to K^{*} ℓ^{+} ℓ^{-}$ decays at Belle

Measurement of the $D^{-}$ polarization in the decay $B^{0} \to D^{-} τ^{+} ν_{τ}$

Measurement of the CKM Matrix Element $∣ V_{c b} ∣$ from $B^{0} \to D^{*-} ℓ^{+} ν_{ℓ}$ at Belle

Observation of Transverse $Λ/ Λ ˉ$ Hyperon Polarization in $e^{+} e^{-}$ Annihilation at Belle

Study of charmless decays $B^{\pm} \to K_{S}^{0} K_{S}^{0} h^{\pm}$ ( $h = K, π$ ) at Belle

Observation of $B^{+} \to p Λ ˉ K^{+} K^{-}$ and $B^{+} \to p ˉ Λ K^{+} K^{+}$

Measurements of branching fraction and $C P$ asymmetry of the $B ˉ^{0} (B^{0}) \to K_{S}^{0} K^{\mp} π^{\pm}$ decay at Belle

Measurements of isospin asymmetry and difference of direct $C P$ asymmetries in inclusive $B \to X_{s} γ$ decays

Observation of $Υ (2 S) \to γ η_{b} (1 S)$ decay

Search for $Υ (1 S, 2 S) \to Z_{c}^{+} Z_{c}^{(') -}$ and $e^{+} e^{-} \to Z_{c}^{+} Z_{c}^{(') -}$ at $s$ = 10.52, 10.58, and 10.867 GeV

Evidence of a structure in $K ˉ^{0} Λ_{c}^{+}$ consistent with a charged $Ξ_{c} (2930)^{+}$ , and updated measurement of $B ˉ^{0} \to K ˉ^{0} Λ_{c}^{+} Λ ˉ_{c}^{-}$ at Belle

Inclusive study of bottomonium production in association with an $η$ meson in $e^{+} e^{-}$ annihilations near $Υ (5 S)$

Measurement of the Decays $Λ_{c} \to Σ π π$ at Belle

Measurement of Branching Fractions of Hadronic Decays of the $Ω_{c}^{0}$ Baryon

Search for $B^{-} \to μ^{-} ν ˉ_{μ}$ Decays at the Belle Experiment

Study of $K_{S}^{0}$ pair production in single-tag two-photon collisions