E. Kovalenko

activity

20212026

B^{+} \to K^{+} ν ν ˉ

decays

90 citations · 962 across the 130 of their papers we have counts for

collaborators

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40 papers · 1 filter

hep-ex2022★ 15 cited

Search for the lepton flavour violating decays $B^{+} \to K^{+} τ^{\pm} ℓ^{\mp}$ ( $ℓ = e, μ$ ) at Belle

Belle Collaboration, S. Watanuki, G. de Marino +176

We present a search for the lepton-flavour-violating decays $B^{+} \to K^{+} τ^{\pm} ℓ^{\mp}$ , with $ℓ = (e, μ)$ , using the full data sample of $772 \times 1 0^{6}$ $B B$ pair…

hep-ex2022★ 9 cited

First observation of $B \to D ˉ_{1} (\to D ˉ π^{+} π^{-}) ℓ^{+} ν_{ℓ}$ and measurement of the $B \to D ˉ^{()} π ℓ^{+} ν_{ℓ}$ and $B \to D ˉ^{()} π^{+} π^{-} ℓ^{+} ν_{ℓ}$ branching fractions with hadronic tagging at Belle

Belle Collaboration, F. Meier, A. Vossen +202

We report measurements of the ratios of branching fractions for $B \to D ˉ^{(*)} π ℓ^{+} ν_{ℓ}$ and $B \to D ˉ^{(*)} π^{+} π^{-} ℓ^{+} ν_{ℓ}$ relative to $B \to \bar{D}^*\ell^+ν_\…

hep-ex2022★ 4 cited

Search for a heavy neutrino in $τ$ decays at Belle

Belle Collaboration, D. Liventsev, I. Adachi +189

We report on a search for a heavy neutrino in the decays $τ^{-} \to π^{-} ν_{h}$ , $ν_{h} \to π^{\pm} ℓ - +$ , $ℓ = e, μ$ . The results are obtained using the full data sample collected wit…

hep-ex2022★ 21 cited

Search for an invisible $Z^{'}$ in a final state with two muons and missing energy at Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +385

The $L_{μ} - L_{τ}$ extension of the standard model predicts the existence of a lepton-flavor-universality-violating $Z^{'}$ boson that couples only to the heavier lepton families.…

hep-ex2022★ 3 cited

Determination of $∣ V_{u b} ∣$ from untagged $B^{0} \to π^{-} ℓ^{+} ν_{ℓ}$ decays using 2019-2021 Belle II data

Belle II Collaboration, K. Adamczyk, L. Aggarwal +588

We present an analysis of the charmless semileptonic decay $B^{0} \to π^{-} ℓ^{+} ν_{ℓ}$ , where $ℓ = e, μ$ , from 198.0 million pairs of $B B ˉ$ mesons recorded by the Belle II…

hep-ex2022★ 18 cited

First Observation of $Λ π^{+}$ and $Λ π^{-}$ Signals near the $K ˉ N (I = 1)$ Mass Threshold in $Λ_{c}^{+} \to Λ π^{+} π^{+} π^{-}$ Decay

Belle Collaboration, Y. Ma, J. Yelton +195

Using the data sample of 980 fb $^{- 1}$ collected with the Belle detector operating at the KEKB asymmetric-energy $e^{+} e^{-}$ collider, we present the results of an investigation of th…

hep-ex2022★ 1 cited

Determination of $∣ V_{c b} ∣$ from $B \to D ℓ ν$ decays using 2019-2021 Belle II data

Belle II collaboration, F. Abudinén, I. Adachi +590

We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $V_{c b}$ using $B \to D ℓ ν$ decays. The result is based on $e^{+} e^{-} \to Υ (4 S)$ data…

hep-ex2022

Measurement of the photon-energy spectrum in inclusive $B \to X_{s} γ$ decays identified using hadronic decays of the recoil $B$ meson in 2019-2021 Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +593

We measure the photon-energy spectrum in radiative bottom-meson ( $B$ ) decays into inclusive final states involving a strange hadron and a photon. We use SuperKEKB electron-positron…

hep-ex2022

Measurement of branching fractions of $Λ_{c}^{+} \to p K_{S}^{0} K_{S}^{0}$ and $Λ_{c}^{+} \to p K_{S}^{0} η$ at Belle

Belle Collaboration, L. K. Li, K. Kinoshita +204

We present a study of a singly Cabibbo-suppressed decay $Λ_{c}^{+} \to p K_{S}^{0} K_{S}^{0}$ and a Cabibbo-favored decay $Λ_{c}^{+} \to p K_{S}^{0} η$ based on 980 $f b^{- 1}$ of data collected by the…

hep-ex2022

Measurement of the branching fractions and $C P$ asymmetries of $B^{+} \to π^{+} π^{0}$ and $B^{+} \to K^{+} π^{0}$ decays in 2019-2021 Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +582

We determine the branching fractions $B$ and $C P$ asymmetries $A_{CP}$ of the decays $B^{+} \to π^{+} π^{0}$ and $B^{+} \to K^{+} π^{0}$ . The result…

hep-ex2022★ 9 cited

Evidence for the singly Cabibbo-suppressed decay $Ω_{c}^{0} \to Ξ^{-} π^{+}$ and search for $Ω_{c}^{0} \to Ξ^{-} K^{+}$ and $Ω^{-} K^{+}$ decays at Belle

Belle Collaboration, X. Han, S. Jia +170

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 de…

hep-ex2022★ 2 cited

Measurement of Branching Fraction and Longitudinal Polarization in $B^{0} \to ρ^{+} ρ^{-}$ Decays at Belle II

Belle II Collaboration, F. Abudinén, I. Adachi +584

We present a measurement of the branching fraction and longitudinal polarization of $B^{0} \to ρ^{+} ρ^{-}$ decays. SuperKEKB electron-positron collision data corresponding to 189~fb$^{-…

hep-ex2022★ 1 cited

Search for rare decays $B^{+} \to D_{s}^{() +} η$ , $D_{s}^{() +} K ˉ^{0}$ , $D^{+} η$ , and $D^{+} K^{0}$

Belle Collaboration, M. Kumar, V. Bhardwaj +196

We present a study of rare decay modes $B^{+} \to D_{s}^{+} h^{0}$ , $B^{+} \to D_{s}^{*+} h^{0}$ , and $B^{+} \to D^{+} h^{0}$ , where $h^{0}$ denotes the neutral mesons $η$ or $K^{0…

hep-ex2022★ 24 cited

Observation of $e^{+} e^{-} \to ω χ_{b J} (1 P)$ and search for $X_{b} \to ω Υ (1 S)$ at $s$ near 10.75 GeV

Belle II collaboration, I. Adachi, L. Aggarwal +348

We study the processes $e^{+} e^{-} \to ω χ_{b J} (1 P)$ ( $J$ = 0, 1, or 2) using samples at center-of-mass energies $s$ = 10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, an…

hep-ex2022★ 8 cited

Measurements of branching fractions of $Λ_{c}^{+} \to Σ^{+} η$ and $Λ_{c}^{+} \to Σ^{+} η^{'}$ and asymmetry parameters of $Λ_{c}^{+} \to Σ^{+} π^{0}$ , $Λ_{c}^{+} \to Σ^{+} η$ , and $Λ_{c}^{+} \to Σ^{+} η^{'}$

Belle Collaboration, S. X. Li, C. P. Shen +168

We report a study of $Λ_{c}^{+} \to Σ^{+} π^{0}$ , $Λ_{c}^{+} \to Σ^{+} η$ , and $Λ_{c}^{+} \to Σ^{+} η^{'}$ using the data sample corresponding to an integrated luminosity of 980 $f b^{- 1}$ collected w…

hep-ex2022★ 12 cited

Measurement of the $Ω_{c}^{0}$ lifetime at Belle II

Belle II Collaboration, F. Abudinén, I. Adachi +353

We report on a measurement of the $Ω_{c}^{0}$ lifetime using $Ω_{c}^{0} \to Ω^{-} π^{+}$ decays reconstructed in $e^{+} e^{-} \to c c ˉ$ data collected by the Belle II experiment and corresponding…

hep-ex2022

Measurement of two-photon decay width of $χ_{c 2} (1 P)$ in $γ γ \to χ_{c 2} (1 P) \to J / ψ γ$ at Belle

The Belle Collaboration, Y. Seino, K. Hayasaka +194

We report the measurement of the two-photon decay width of $χ_{c 2} (1 P)$ in two-photon processes at the Belle experiment. We analyze the process $ γγ\rightarrow χ_{c2}(1P) \rightarr…

hep-ex2022★ 1 cited

First measurement of the $B^{+} \to π^{+} π^{0} π^{0}$ branching fraction and \textit{CP} asymmetry

Belle Collaboration, Y. -T. Lai, I. Adachi +198

We study $B^{+} \to π^{+} π^{0} π^{0}$ using 711 $fb^{- 1}$ of data collected at the $Υ (4 S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+} e^{-}$ collider.…

hep-ex2022

Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B \to J / ψ K$ decays at Belle II

Belle II Collaboration, F. Abudinén, I. Adachi +591

We report a study of $B \to J / ψ (ℓ^{+} ℓ^{-}) K$ decays, where $ℓ$ represents an electron or a muon, using $e^{+} e^{-}$ collisions at the $Υ (4 S)$ resonance. The data were col…

hep-ex2022

Measurement of the $B^{+} / B^{0}$ production ratio in $e^{+} e^{-}$ collisions at the $Υ (4 S)$ resonance using $B \to J / ψ (ℓℓ) K$ decays at Belle

Belle Collaboration, S. Choudhury, S. Sandilya +197

We measure the ratio of branching fractions for the $Υ (4 S)$ decays to $B^{+} B^{-}$ and $B^{0} B ˉ^{0}$ using $B^{+} \to J / ψ (ℓℓ) K^{+}$ and $B^0 \rightarrow J/ψ(\ell\ell) K^0…

hep-ex2022★ 19 cited

Search for a dark photon and an invisible dark Higgs boson in $μ^{+} μ^{-}$ and missing energy final states with the Belle II experiment

Belle II Collaboration, F. Abudinén, I. Adachi +357

The dark photon $A^{'}$ and the dark Higgs boson $h^{'}$ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of $A^\pri…

hep-ex2022★ 1 cited

Measurements of the branching fractions $B (B ˉ^{0} \to D^{+} π^{-})$ and $B (B ˉ^{0} \to D^{+} K^{-})$ and tests of QCD factorization

Belle Collaboration, J. F. Krohn, D. Ferlewicz +198

Using $(771.6 \pm 10.6) \times 1 0^{6}$ $B B ˉ$ meson pairs recorded by the Belle experiment at the KEKB $e^{+} e^{-}$ collider, we report the branching fractions $\mathcal{B}(\bar{B}^…

hep-ex2022★ 2 cited

Angular analysis of $B^{+} \to ρ^{+} ρ^{0}$ decays reconstructed in 2019, 2020, and 2021 Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +590

We report on a Belle II measurement of the branching fraction ( $B$ ), longitudinal polarization fraction ( $f_{L}$ ), and CP asymmetry ( $A_{C P}$ ) of $B^{+} \to ρ^{+} ρ^{0}$ …

hep-ex2022

Measurement of the branching fraction of the $B^{0} \to K_{S}^{0} π^{0} γ$ decay using 190 fb $^{- 1}$ of Belle II data

Belle II Collaboration, F. Abudinén, I. Adachi +590

We report the measurement of the branching fraction of the $B^{0} \to K_{S}^{0} π^{0} γ$ decay in $e^{+} e^{-} \to Υ (4 S) \to B B$ data recorded by the Belle II experiment at the Sup…

Search for the lepton flavour violating decays B+→K+τ±ℓ∓ (ℓ=e,μ) at Belle

First observation of B→Dˉ1​(→Dˉπ+π−)ℓ+νℓ​ and measurement of the B→Dˉ(∗)πℓ+νℓ​ and B→Dˉ(∗)π+π−ℓ+νℓ​ branching fractions with hadronic tagging at Belle

Search for a heavy neutrino in τ decays at Belle

Search for an invisible Z′ in a final state with two muons and missing energy at Belle II

Determination of ∣Vub​∣ from untagged B0→π−ℓ+νℓ​ decays using 2019-2021 Belle II data

First Observation of Λπ+ and Λπ− Signals near the KˉN(I=1) Mass Threshold in Λc+​→Λπ+π+π− Decay

Determination of ∣Vcb​∣ from B→Dℓν decays using 2019-2021 Belle II data

Measurement of the photon-energy spectrum in inclusive B→Xs​γ decays identified using hadronic decays of the recoil B meson in 2019-2021 Belle II data

Measurement of branching fractions of Λc+​→pKS0​KS0​ and Λc+​→pKS0​η at Belle

Measurement of the branching fractions and CP asymmetries of B+→π+π0 and B+→K+π0 decays in 2019-2021 Belle II data

Evidence for the singly Cabibbo-suppressed decay Ωc0​→Ξ−π+ and search for Ωc0​→Ξ−K+ and Ω−K+ decays at Belle

Measurement of Branching Fraction and Longitudinal Polarization in B0→ρ+ρ− Decays at Belle II

Search for rare decays B+→Ds(∗)+​η, Ds(∗)+​Kˉ0, D+η, and D+K0

Observation of e+e−→ωχbJ​(1P) and search for Xb​→ωΥ(1S) at s​ near 10.75 GeV

Measurements of branching fractions of Λc+​→Σ+η and Λc+​→Σ+η′ and asymmetry parameters of Λc+​→Σ+π0, Λc+​→Σ+η, and Λc+​→Σ+η′

Measurement of the Ωc0​ lifetime at Belle II

Measurement of two-photon decay width of χc2​(1P) in γγ→χc2​(1P)→J/ψγ at Belle

First measurement of the B+→π+π0π0 branching fraction and \textit{CP} asymmetry

Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in B→J/ψK decays at Belle II

Measurement of the B+/B0 production ratio in e+e− collisions at the Υ(4S) resonance using B→J/ψ(ℓℓ)K decays at Belle

Search for a dark photon and an invisible dark Higgs boson in μ+μ− and missing energy final states with the Belle II experiment

Measurements of the branching fractions B(Bˉ0→D∗+π−) and B(Bˉ0→D∗+K−) and tests of QCD factorization

Angular analysis of B+→ρ+ρ0 decays reconstructed in 2019, 2020, and 2021 Belle II data

Measurement of the branching fraction of the B0→KS0​π0γ decay using 190 fb−1 of Belle II data

Search for the lepton flavour violating decays $B^{+} \to K^{+} τ^{\pm} ℓ^{\mp}$ ( $ℓ = e, μ$ ) at Belle

First observation of $B \to D ˉ_{1} (\to D ˉ π^{+} π^{-}) ℓ^{+} ν_{ℓ}$ and measurement of the $B \to D ˉ^{()} π ℓ^{+} ν_{ℓ}$ and $B \to D ˉ^{()} π^{+} π^{-} ℓ^{+} ν_{ℓ}$ branching fractions with hadronic tagging at Belle

Search for a heavy neutrino in $τ$ decays at Belle

Search for an invisible $Z^{'}$ in a final state with two muons and missing energy at Belle II

Determination of $∣ V_{u b} ∣$ from untagged $B^{0} \to π^{-} ℓ^{+} ν_{ℓ}$ decays using 2019-2021 Belle II data

First Observation of $Λ π^{+}$ and $Λ π^{-}$ Signals near the $K ˉ N (I = 1)$ Mass Threshold in $Λ_{c}^{+} \to Λ π^{+} π^{+} π^{-}$ Decay

Determination of $∣ V_{c b} ∣$ from $B \to D ℓ ν$ decays using 2019-2021 Belle II data

Measurement of the photon-energy spectrum in inclusive $B \to X_{s} γ$ decays identified using hadronic decays of the recoil $B$ meson in 2019-2021 Belle II data

Measurement of branching fractions of $Λ_{c}^{+} \to p K_{S}^{0} K_{S}^{0}$ and $Λ_{c}^{+} \to p K_{S}^{0} η$ at Belle

Measurement of the branching fractions and $C P$ asymmetries of $B^{+} \to π^{+} π^{0}$ and $B^{+} \to K^{+} π^{0}$ decays in 2019-2021 Belle II data

Evidence for the singly Cabibbo-suppressed decay $Ω_{c}^{0} \to Ξ^{-} π^{+}$ and search for $Ω_{c}^{0} \to Ξ^{-} K^{+}$ and $Ω^{-} K^{+}$ decays at Belle

Measurement of Branching Fraction and Longitudinal Polarization in $B^{0} \to ρ^{+} ρ^{-}$ Decays at Belle II

Search for rare decays $B^{+} \to D_{s}^{() +} η$ , $D_{s}^{() +} K ˉ^{0}$ , $D^{+} η$ , and $D^{+} K^{0}$

Observation of $e^{+} e^{-} \to ω χ_{b J} (1 P)$ and search for $X_{b} \to ω Υ (1 S)$ at $s$ near 10.75 GeV

Measurements of branching fractions of $Λ_{c}^{+} \to Σ^{+} η$ and $Λ_{c}^{+} \to Σ^{+} η^{'}$ and asymmetry parameters of $Λ_{c}^{+} \to Σ^{+} π^{0}$ , $Λ_{c}^{+} \to Σ^{+} η$ , and $Λ_{c}^{+} \to Σ^{+} η^{'}$

Measurement of the $Ω_{c}^{0}$ lifetime at Belle II

Measurement of two-photon decay width of $χ_{c 2} (1 P)$ in $γ γ \to χ_{c 2} (1 P) \to J / ψ γ$ at Belle

First measurement of the $B^{+} \to π^{+} π^{0} π^{0}$ branching fraction and \textit{CP} asymmetry

Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B \to J / ψ K$ decays at Belle II

Measurement of the $B^{+} / B^{0}$ production ratio in $e^{+} e^{-}$ collisions at the $Υ (4 S)$ resonance using $B \to J / ψ (ℓℓ) K$ decays at Belle

Search for a dark photon and an invisible dark Higgs boson in $μ^{+} μ^{-}$ and missing energy final states with the Belle II experiment

Measurements of the branching fractions $B (B ˉ^{0} \to D^{+} π^{-})$ and $B (B ˉ^{0} \to D^{+} K^{-})$ and tests of QCD factorization

Angular analysis of $B^{+} \to ρ^{+} ρ^{0}$ decays reconstructed in 2019, 2020, and 2021 Belle II data

Measurement of the branching fraction of the $B^{0} \to K_{S}^{0} π^{0} γ$ decay using 190 fb $^{- 1}$ of Belle II data