D. Greenwald
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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: The Belle II Pixel Vertex Detector
The Belle II Pixel Vertex Detector Open
The Belle II experiment at the SuperKEKB $e^{+}e^{-}$ collider took data from 2019 to 2022 (Run 1) and is currently undergoing its planned first long shutdown (LS1). During its operational period, SuperKEKB achieved a record-breaking insta…
View article: Partial-wave analysis of $τ^-\toπ^-π^-π^+ν_τ$ at Belle
Partial-wave analysis of $τ^-\toπ^-π^-π^+ν_τ$ at Belle Open
We present preliminary results of a partial-wave analysis of $τ^-\toπ^-π^-π^+ν_τ$ in data from the Belle experiment at the KEKB $\mathrm{e}^+\mathrm{e}^-$ collider. We demonstrate the presence of the $\mathrm{a}_1(1420)$ and $\mathrm{a}_1(…
View article: Search for $C\!P$ violation using $T$-odd correlations in $D_{(s)}^{+}\to K^{+} K^{-}π^{+}π^{0}$, $D_{(s)}^{+}\to K^{+} π^{-}π^{+}π^{0}$, and $D^{+}\to K^{-}π^{+}π^{+}π^{0}$ decays
Search for $C\!P$ violation using $T$-odd correlations in $D_{(s)}^{+}\to K^{+} K^{-}π^{+}π^{0}$, $D_{(s)}^{+}\to K^{+} π^{-}π^{+}π^{0}$, and $D^{+}\to K^{-}π^{+}π^{+}π^{0}$ decays Open
We search for $C\!P$ violation using $T$-odd correlations in five $D_{(s)}^{+}$ and $D_{(s)}^{-}$ four-body decays. Our analysis is based on 980 $\rm fb^{-1}$ of data collected by the Belle detector at the KEKB energy-asymmetric $e^+e^-$ c…
View article: Status of the BELLE II Pixel Detector
Status of the BELLE II Pixel Detector Open
The Belle II experiment at the super KEK B-factory (SuperKEKB) in Tsukuba, Japan, has been collecting $e^+e^−$ collision data since March 2019. Operating at a record-breaking luminosity of up to $4.7×10^{34} cm^{−2}s^{−1}$, data correspond…
View article: A new Software Training Model at Belle II
A new Software Training Model at Belle II Open
The physics output of modern experimental HEP collaborations hinges not only on the quality of its software but also on the ability of the collaborators to make the best possible use of it. With the COVID-19 pandemic making in-person train…
View article: Partial wave analysis of $\tau^-\to\pi^-\pi^+\pi^-\nu_\tau$ at Belle
Partial wave analysis of $\tau^-\to\pi^-\pi^+\pi^-\nu_\tau$ at Belle Open
We present simulation studies in preparation for analyzing $\tau^-\to\pi^-\pi^+\pi^-\nu_\tau$ in data from the Belle experiment at the KEK $\text{e}^+\text{e}^-$ collider. Analyzing this decay can shed light on the $\text{a}_1(1260)$ and $…
View article: Partial wave analysis of $τ^-\toπ^-π^+π^-ν_τ$ at Belle
Partial wave analysis of $τ^-\toπ^-π^+π^-ν_τ$ at Belle Open
We present simulation studies in preparation for analyzing $τ^-\toπ^-π^+π^-ν_τ$ in data from the Belle experiment at the KEK $\mathrm{e}^+\mathrm{e}^-$ collider. Analyzing this decay can shed light on the $\mathrm{a}_1(1260)$ and $\mathrm{…
View article: Snowmass White Paper: Belle II physics reach and plans for the next decade and beyond
Snowmass White Paper: Belle II physics reach and plans for the next decade and beyond Open
Belle II is an experiment operating at the intensity frontier. Over the next decades, it will record the decay of billions of bottom mesons, charm hadrons, and tau leptons produced in 10 GeV electron-positron collisions at the SuperKEKB hi…
View article: An improved search for the electric dipole moment of the $\tau$ lepton
An improved search for the electric dipole moment of the $\tau$ lepton Open
We report a measurement of the electric dipole moment of the $τ$ lepton $(d_{τ})$ 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. Using…
View article: Search for lepton-flavor-violating tau-lepton decays to $\ell\gamma$ at Belle
Search for lepton-flavor-violating tau-lepton decays to $\ell\gamma$ at Belle Open
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 $\\tau^{\\pm}\\rightarrow\\ell^{\\pm}\\gamma$ ($\\ell=e,\\mu$) are predicted to…
View article: Search for $B^{0} \to \tau^\pm \ell^\mp$ ($\ell=e,\mu$ ) with a hadronic tagging method at Belle
Search for $B^{0} \to \tau^\pm \ell^\mp$ ($\ell=e,\mu$ ) with a hadronic tagging method at Belle Open
We present a search for the lepton-flavor-violating decays $B^{0} \to \tau^\pm \ell^\mp$, where $\ell=(e,\,\mu)$, using the full data sample of $772 \times 10^6$ $B \overline{B}$ pairs recorded by the Belle detector at the KEKB asymmetric-…
View article: Commissioning and performance of the Belle II pixel detector
Commissioning and performance of the Belle II pixel detector Open
http://dx.doi.org/10.13039/501100001823 Ministerstvo Školství, Mládeže a Tělovýchovy
View article: Measurement of two-particle correlations in hadronic $e^{+}e^{-}$ collisions at Belle
Measurement of two-particle correlations in hadronic $e^{+}e^{-}$ collisions at Belle Open
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 widely observed in high multiplicity proton-proton, proton-ion …
View article: Belle II Pixel Detector Commissioning and Operational Experience
Belle II Pixel Detector Commissioning and Operational Experience Open
The Belle II experiment at the Super Flavour Factory SuperKEKB in Tsukuba, Japan, has started regular\noperation with its final detector setup in spring 2019. The Belle II vertexing system consists of four layers\nof double sided silicon s…
View article: Alignment for the first precision measurements at Belle II
Alignment for the first precision measurements at Belle II Open
On March 25th 2019, the Belle II detector recorded the first collisions delivered by the SuperKEKB accelerator. This marked the beginning of the physics run with vertex detector. The vertex detector was aligned initially with cosmic ray tr…
View article: Data quality monitors of vertex detectors at the start of the Belle II experiment
Data quality monitors of vertex detectors at the start of the Belle II experiment Open
The Belle II experiment features a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric e + e − collider at KEK in Tsukuba, Japan. The accelerator completed its first phase of commissioning in 2016,…
View article: Measurement of the $D^{\ast-}$ polarization in the decay $B^0 \to D^{\ast -}τ^+ν_τ$
Measurement of the $D^{\ast-}$ polarization in the decay $B^0 \to D^{\ast -}τ^+ν_τ$ Open
We report the first measurement of the $D^{\ast -}$ meson polarization in the decay $B^0 \to D^{*-} τ^+ν_τ$ using the full data sample of 772$\times 10^6$ $B\bar{B}$ pairs recorded with the Belle detector at the KEKB electron-positron coll…
View article: Measurements of branching fraction and $CP$ asymmetry of the $\bar{B}^{0}(B^{0})\to K^{0}_{S}K^{\mp}π^{\pm}$ decay at Belle
Measurements of branching fraction and $CP$ asymmetry of the $\bar{B}^{0}(B^{0})\to K^{0}_{S}K^{\mp}π^{\pm}$ decay at Belle Open
We report the measurement of the branching fraction and $CP$ asymmetry for the $\bar{B}^{0}(B^{0})\to K^{0}_{S}K^{\mp}π^{\pm}$ decay. The analysis is performed on a data sample of 711 $\rm{fb}^{-1}$ collected at the $Υ(4S)$ resonance with …
View article: Ambiguities in model-independent partial-wave analysis
Ambiguities in model-independent partial-wave analysis Open
Partial wave analysis is an important tool for analyzing large data sets in hadronic decays of light and heavy mesons. It commonly relies on the isobar model, which assumes multihadron final states originate from successive two-body decays…
View article: BAT release, version 1.0.0
BAT release, version 1.0.0 Open
This release is the result of a major clean up of the code and build system. This allowed us to implement important new features but implied that we had to break compatibility with previous releases. We removed many inconsistencies in the …
View article: Search for $CP$ violation with Kinematic Asymmetries in the $D^{0}\rightarrow K^{+}K^{-}\pi^{+}\pi^{-}$ Decay
Search for $CP$ violation with Kinematic Asymmetries in the $D^{0}\rightarrow K^{+}K^{-}\pi^{+}\pi^{-}$ Decay Open
We search for $CP$ violation in the singly-Cabibbo-suppressed decay $D^{0}\rightarrow K^{+}K^{-}\pi^{+}\pi^{-}$ using data corresponding to an integrated luminosity of $988\text{ }{\rm fb}^{-1}$ collected by the Belle detector at the KEKB …
View article: Measurement of the τ Michel parameters $\bar{\eta}$ and $\xi\kappa$ in the radiative leptonic decay $\tau^- \rightarrow \ell^- \nu_{\tau} \bar{\nu}_{\ell}\gamma$
Measurement of the τ Michel parameters $\bar{\eta}$ and $\xi\kappa$ in the radiative leptonic decay $\tau^- \rightarrow \ell^- \nu_{\tau} \bar{\nu}_{\ell}\gamma$ Open
We present a measurement of the Michel parameters of the $τ$ lepton, $\barη$ and $ξκ$, in the radiative leptonic decay $τ^- \rightarrow \ell^- ν_τ \barν_{\ell} γ$ using 711~f$\mathrm{b}^{-1}$ of collision data collected with the Belle dete…