A. Bondar
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View article: Model-agnostic likelihood for the reinterpretation of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mi>B</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> <mml:mo stretchy="false">→</mml:mo> <mml:msup> <mml:mrow> <mml:mi>K</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> <mml:mi>v</mml:mi> <mml:mover accent="true"> <mml:mrow> <mml:mi>v</mml:mi> </mml:mrow> <mml:mrow> <mml:mo stretchy="false">¯</mml:mo> </mml:mrow> </mml:mover> </mml:mrow> </mml:math> measurement at Belle II
Model-agnostic likelihood for the reinterpretation of the measurement at Belle II Open
We recently measured the branching fraction of the B + → K + ν ν ¯ decay using 362 fb − 1 of on-resonance e + e − collision data under the assumption of Standard Model kinematics, providing the first evidence fo…
View article: On the determination of the relative probability of $${\varUpsilon }(5S) \rightarrow B^{(*)}_s\bar{B}^{(*)}_s$$ decays
On the determination of the relative probability of $${\varUpsilon }(5S) \rightarrow B^{(*)}_s\bar{B}^{(*)}_s$$ decays Open
Semileptonic decays of the $$B \overline{B}$$ pairs produced in the $${\varUpsilon }(5S)$$ can be used to find the relative probability of $${\varUpsilon }(5\,S) \rightarrow B_s \overline{B}_s$$ decays. This c…
View article: New measurement of D0 and D+ meson masses with the KEDR detector
New measurement of D0 and D+ meson masses with the KEDR detector Open
A bstract Using the 4.9 pb −1 statistics collected at the peak of the ψ (3770) resonance with the KEDR detector at the VEPP-4M electron-positron collider, we measured the masses of the neutral and charged D mesons: $$\begin{array}{c}{M}_{{…
View article: Observation of the radiative decay $D_s (2317)^+ \to D_s^* γ$
Observation of the radiative decay $D_s (2317)^+ \to D_s^* γ$ Open
We observe the radiative decay $D^{*}_{s0}(2317)^{+} \to D_{s}^{*+} γ$ for the first time, with a significance exceeding $10$ standard deviations. The signal is found in the continuum $e^+ e^- \to c\bar{c}$ process with the combined data s…
Measurement of the branching fraction and search for and decays at Belle Open
We present a study of the rare charm meson decays D 0 → K + K − e + e − , π + π − e + e − , and K − π + e + e − using a 942 fb − 1 dataset collected by the Belle detector at the KEKB asymmetric-e…
View article: Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment
Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment Open
Inelastic dark matter models that have two dark matter particles and a massive dark photon can reproduce the observed relic dark matter density without violating cosmological limits. The mass splitting between the two dark matter particles…
View article: Measurement of B → K*(892)γ decays at Belle II
Measurement of B → K*(892)γ decays at Belle II Open
A bstract We present measurements of B → K * (892) γ decays using 365 fb − 1 of data collected from 2019 to 2022 by the Belle II experiment at the SuperKEKB asymmetric-energy e + e − collider. The data sample contains (387 ± 6) × 10 6 Υ(4 …
View article: New measurement of D0 and D+ meson masses with the KEDR detector
New measurement of D0 and D+ meson masses with the KEDR detector Open
Using the 4.9 pb$^{-1}$ statistics collected at the peak of the $ψ(3770)$ resonance with the KEDR detector at the VEPP-4M electron-positron collider, we measured the masses of the neutral and charged D mesons: $M_{D^0} = 1865.100 \pm 0.210…
View article: Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment
Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment Open
Inelastic dark matter models that have two dark matter particles and a massive dark photon can reproduce the observed relic dark matter density without violating cosmological limits. The mass splitting between the two dark matter particles…
View article: Search for lepton-flavor-violating $τ^- \to \ell^- K_s^0$ decays at Belle and Belle II
Search for lepton-flavor-violating $τ^- \to \ell^- K_s^0$ decays at Belle and Belle II Open
We present the results of a search for charged-lepton-flavor violating decays $τ^{-} \rightarrow \ell^{-}K_{S}^{0}$, where $\ell^{-}$ is either an electron or a muon. We combine $e^+e^-$ data samples recorded by the Belle II experiment at …
View article: Measurement of the Branching Fraction of $\Lambda_c^+ \to p K_S^0 \pi^0$ at Belle
Measurement of the Branching Fraction of $\Lambda_c^+ \to p K_S^0 \pi^0$ at Belle Open
We report a precise measurement of the ratio of branching fractions $\mathcal{B}(\Lambda_c^+\to p K_S^0 \pi^0)/\mathcal{B}(\Lambda_c^+\to p K^- \pi^+)$ using 980 fb$^{-1}$ of $e^+e^-$ data from the Belle experiment. We obtain a value of $\…
View article: Search for the lepton-flavor-violating $τ^{-} \rightarrow e^{\mp} \ell^{\pm} \ell^{\mp}$ decays at Belle II
Search for the lepton-flavor-violating $τ^{-} \rightarrow e^{\mp} \ell^{\pm} \ell^{\mp}$ decays at Belle II Open
We present the result of a search for the charged-lepton-flavor violating decays $τ^- \rightarrow e^\mp \ell^\pm \ell^-$, where $\ell$ is a muon or an electron, using a data sample with an integrated luminosity of 428 fb$^{-1}$ recorded by…
View article: IMPROVING THE EFFICIENCY OF CONSTRUCTION PROJECT MANAGEMENT THROUGH THE INTEGRATION OF 4D MODELING AND AUGMENTED AND VIRTUAL REALITY TECHNOLOGIES
IMPROVING THE EFFICIENCY OF CONSTRUCTION PROJECT MANAGEMENT THROUGH THE INTEGRATION OF 4D MODELING AND AUGMENTED AND VIRTUAL REALITY TECHNOLOGIES Open
The integration of 4D-information modeling technologies of capital construction objects with augmented (AR) and virtual (VR) reality methods opens up new opportunities for improving the efficiency of construction project management. The ar…
View article: Measurement of $CP$ asymmetries in $B^0 \to K^0_S \pi^0 \gamma$ decays at Belle II
Measurement of $CP$ asymmetries in $B^0 \to K^0_S \pi^0 \gamma$ decays at Belle II Open
We report measurements of time-dependent $CP$ asymmetries in $B^0 \to K^0_S \pi^0 \gamma$ decays based on a data sample of $(388\pm6)\times10^6$$B\bar{B}$ events collected at the $\Upsilon(4S)$ resonance with the Belle II detector. The Bel…
View article: Measurement of the $ D^{0}\rightarrow K^{-}π^{+}e^{+}e^{-} $ branching fraction and search for $ D^{0}\rightarrow π^{+}π^{-}e^{+}e^{-} $ and $D^{0}\rightarrow K^{+}K^{-}e^{+}e^{-} $ decays at Belle
Measurement of the $ D^{0}\rightarrow K^{-}π^{+}e^{+}e^{-} $ branching fraction and search for $ D^{0}\rightarrow π^{+}π^{-}e^{+}e^{-} $ and $D^{0}\rightarrow K^{+}K^{-}e^{+}e^{-} $ decays at Belle Open
We present a study of the rare charm meson decays $ D^{0}\rightarrow K^{+}K^{-}e^{+}e^{-} $, $ π^{+}π^{-}e^{+}e^{-} $, and $ K^{-}π^{+}e^{+}e^{-} $ using a 942 fb$^{-1}$ data set collected by the Belle detector at the KEKB asymmetric-energ…
View article: Determination of $|V_{cb}|$ using $B\to D\ellν_\ell$ Decays at Belle II
Determination of $|V_{cb}|$ using $B\to D\ellν_\ell$ Decays at Belle II Open
We present a determination of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ from the decay $B\to D\ellν_\ell$ using a $365~\mathrm{fb}^{-1}$$e^+e^-\toΥ(4S)\to B\bar B$ data sample recorded by the Belle II experiment at the SuperK…
View article: Charged-hadron identification at Belle II
Charged-hadron identification at Belle II Open
The Belle II experiment's ability to identify particles critically affects the sensitivity of its measurements. We describe Belle II's algorithms for identifying charged particles and evaluate their performance in separating pions, kaons, …
View article: Observations of the singly Cabibbo-suppressed decays $Ξ_c^{+} \to pK_{S}^{0}$, $Ξ_c^+ \to Λπ^+$, and $Ξ_c^+ \to Σ^{0} π^+$ at Belle and Belle II
Observations of the singly Cabibbo-suppressed decays $Ξ_c^{+} \to pK_{S}^{0}$, $Ξ_c^+ \to Λπ^+$, and $Ξ_c^+ \to Σ^{0} π^+$ at Belle and Belle II Open
Using data samples of 983.0~$\rm fb^{-1}$ and 427.9~$\rm fb^{-1}$ accumulated with the Belle and Belle~II detectors operating at the KEKB and SuperKEKB asymmetric-energy $e^+e^-$ colliders, singly Cabibbo-suppressed decays $Ξ_c^{+} \to pK_…
View article: Recent results on the low-pressure GEM-based TPC at an Accelerator Mass Spectrometer
Recent results on the low-pressure GEM-based TPC at an Accelerator Mass Spectrometer Open
The Accelerator Mass Spectrometry technique makes it possible to measure rare long-lived isotopes such as $^{10}$Be, $^{14}$C, $^{26}$Al, $^{36}$Cl, $^{41}$Ca and $^{129}$I. The content of these isotopes can be at the level of 10$^{-15}$ o…
View article: Evidence of $h_{b}(\text{2P}) \to Υ(\text{1S})η$ decay and search for $h_{b}(\text{1P,2P}) \to Υ(\text{1S})π^0$ with the Belle detector
Evidence of $h_{b}(\text{2P}) \to Υ(\text{1S})η$ decay and search for $h_{b}(\text{1P,2P}) \to Υ(\text{1S})π^0$ with the Belle detector Open
We report the first evidence for the $h_{b}(\text{2P}) \to Υ(\text{1S})η$ transition with a significance of $3.5$ standard deviations. The decay branching fraction is measured to be $\mathcal{B}[h_{b}(\text{2P}) \to Υ(\text{1S})η]=(7.1 ~^{…
View article: Measurement of branching-fraction ratios and CP asymmetries in B± → DCP±K± decays at Belle and Belle II
Measurement of branching-fraction ratios and CP asymmetries in B± → DCP±K± decays at Belle and Belle II Open
A bstract 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 $$ {K}_S^0{\pi}^0 $$ , where D is an admixture of D 0 and $$ {\overline{D}}^0 $$ …