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Article
Open AccessMeasurement of branching-fraction ratios and CP asymmetries in B± → DCP±K± decays at Belle and Belle II
We report results from a study of B± → DK± decays followed by D decaying to the CP-even final state K+K− and CP-odd final state ...
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Article
Open AccessSearch for charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays at Belle
We report a search for the charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays using a 25 fb−1 Υ(2S) sample collected by the Belle detector at the KEKB e+e− asymmetric-energy collider. We find no ev...
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Article
Open AccessMeasurement of CP asymmetries and branching-fraction ratios for B± → DK± and Dπ± with D → \( {K}_{\textrm{S}}^0 \) K±π∓ using Belle and Belle II data
We measure CP asymmetries and branching-fraction ratios for B± → DK± and Dπ± decays with D → K ...
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Article
Open AccessSearch for \( {\textrm{B}}_{\textrm{s}}^0 \) → ℓ∓τ± with the semi-leptonic tagging method at Belle
We present a search for the lepton-flavor-violating decays B s ...
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Article
Open AccessMeasurement of the e+e− → \( {B}_s^0{\overline{B}}_s^0X \) cross section in the energy range from 10.63 to 11.02 GeV using inclusive \( {D}_s^{+} \) and D0 production
We report the first measurement of the inclusive e+e− → b b ¯ ...
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Article
Open AccessSearch for the double-charmonium state with ηcJ/ψ at Belle
We measure the cross section of e+e− → ηcJ/ψ at the Υ(nS)(n = 1–5) on-resonance and 10.52 GeV off-resonance energy points using the full data sample collected by the Belle detector with an integrated luminosity o...
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Article
Open AccessSearch for lepton-flavor-violating τ decays into a lepton and a vector meson using the full Belle data sample
Charged-lepton-flavor-violation is predicted in several new physics scenarios. We update the analysis of τ lepton decays into a light charged lepton (ℓ = e± or μ±) and a vector meson (V0 = ρ0, ϕ, ω, K*0, or ...
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Article
Open AccessTwo-particle angular correlations in e+e− collisions to hadronic final states in two reference coordinates at Belle
We present the analysis of two-particle angular correlations using coordinate systems defined with the conventional beam axis and the event thrust axis. We propose the latter as a good representation for the c...
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Article
Open AccessMeasurement of two-photon decay width of χc2(1P) in γγ → χc2(1P) → J/ψγ at Belle
We report the measurement of the two-photon decay width of χc2(1P) in two-photon processes at the Belle experiment. We analyze the process γγ → χc2(1P) → J/ψγ, J/ψ → ℓ+ℓ− (ℓ = e or μ) using a data sample of 971 f...
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Article
Open AccessEvidence for the singly Cabibbo-suppressed decay \( {\Omega}_c^0\to {\**}^{-}{\pi}^{+} \) and search for \( {\Omega}_c^0\to {\**}^{-}{K}^{+} \) and Ω−K+ decays at Belle
Using a data sample of 980 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we study for the first time the singly Cabibbo-suppressed decays
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Article
Open AccessErratum to: Combined analysis of Belle and Belle II data to determine the CKM angle ϕ3 using B+ → D( \( {\textrm{K}}_{\textrm{S}}^0 \) h+h−)h+ decays
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Article
Open AccessSearch for charged lepton flavor violating decays of ϒ (1S)
We present a search for the charged lepton-flavor-violating decays ϒ(1S) → ℓ±ℓ′∓ and radiative charged lepton-flavour-violating decays ϒ(1S) → γℓ±ℓ′∓ [ℓ,ℓ′ = e, μ, τ] using the 158 million ϒ(2S) sample collected ...
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Article
Open AccessAn improved search for the electric dipole moment of the τ lepton
We report a measurement of the electric dipole moment of the τ lepton (dτ) using an 833 fb−1 data sample collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e− collider. Us...
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Article
Open AccessFirst measurement of the \( {\Lambda}_c^{+} \) → pη′ decay
We present the first measurement of the branching fraction of the singly Cabibbo-suppressed (SCS) decay ...
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Article
Open AccessCombined analysis of Belle and Belle II data to determine the CKM angle ϕ3 using B+ → D( \( {K}_S^0 \) h+h−)h+ decays
We present a measurement of the Cabibbo-Kobayashi-Maskawa unitarity triangle angle ϕ3 (also known as γ) using a model-independent Dalitz plot analysis of B+ → D (
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Article
Open AccessSearch for lepton-flavor-violating tau-lepton decays to ℓγ at Belle
Charged lepton flavor violation is forbidden in the Standard Model but possible in several new physics scenarios. In many of these models, the radiative decays τ± → ℓ±γ (ℓ = e, μ) are predicted to have a sizeable...
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Article
Open AccessMeasurement of branching fractions and search for CP violation in D0 → π+π−η, D0 → K+K−η, and D0 → ϕη at Belle
We measure the branching fractions and CP asymmetries for the singly Cabibbo-suppressed decays D0 → π+π−η, D0 → K+K−η, and D0 → ϕη, using 980 fb−1 of data from the Belle experiment at the KEKB e+e− collider. We o...
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Article
Open AccessMeasurements of branching fractions and asymmetry parameters of \( {\**}_c^0\to \Lambda {\overline{K}}^{\ast 0} \) , \( {\**}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0} \) , and \( {\**}_c^0\to {\Sigma}^{+}{K}^{\ast -} \) decays at Belle
Using a data sample of 980 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we study the processes of ...
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Article
Open AccessMeasurement of the energy dependence of the e+e− → \( B\overline{B} \) , \( B{\overline{B}}^{\ast } \) and \( {B}^{\ast }{\overline{B}}^{\ast } \) exclusive cross sections
We report the first measurement of the exclusive cross sections e+e− → B B ...
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Article
Open AccessThe hadronic \(\tau \) decay \(\tau ^-\rightarrow K_1^-\nu _\tau \rightarrow (K^-\omega ) \nu _\tau \rightarrow (K^- \pi ^+\pi ^-\pi ^0)\nu _\tau \) and the axial vector mixing angle
We propose to measure the $$\tau ^-\rightarrow K_1^-\nu _\tau \rightarrow (K^-\omega ) \nu _\tau \rightarrow (K^- \pi ^+\pi ^-\pi ^0)\nu _\tau...
