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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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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 AccessB-flavor tagging at Belle II
We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ( ) mesons at Belle II. The algorithms provide essential inputs for measurement...
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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 AccessPunzi-loss:
We present the novel implementation of a non-differentiable metric approximation and a corresponding loss-scheduling aimed at the search for new particles of unknown mass in high energy physics experiments. We...
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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...