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View article: A Study on the Development of a Genetic Algorithm-Based Automated Class Timetable Generation System
A Study on the Development of a Genetic Algorithm-Based Automated Class Timetable Generation System Open
View article: Performance and running experience of the Belle II silicon vertex detector
Performance and running experience of the Belle II silicon vertex detector Open
The Belle II silicon vertex detector is one of the vertex detectors in the Belle II experiment. The detector reads out the signals from the double-sided silicon strip sensors with the APV25 front-end readout ASIC, adopting the chip-on-sens…
View article: The design, construction, operation and performance of the Belle II silicon vertex detector
The design, construction, operation and performance of the Belle II silicon vertex detector Open
The Silicon Vertex Detector of Belle II is a state-of-the-art tracking and vertexing system based on double-sided silicon strip sensors, designed and fabricated by a large international collaboration in the period 2012–2018. Since 2019 it …
View article: Measurement of the branching fractions of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:mi>η</mml:mi><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>+</mml:mo></mml:msup><mml:msub><mml:mi>ν</mml:mi><mml:mo>ℓ</mml:mo></mml:msub></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>+</mml:mo></mml:msup><mml:msub><mml:mi>ν</mml:mi><mml:mo>ℓ</mml:mo></mml:msub></mml:math> decays with signal-side only reconstruction in the full <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>q</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math> range
Measurement of the branching fractions of the and decays with signal-side only reconstruction in the full range Open
Funder: \n Pacific Northwest National Laboratory\n http://dx.doi.org/10.13039/100011661
View article: Search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>Z</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>μ</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>μ</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>L</mml:mi></mml:mrow><mml:mrow><mml:mi>μ</mml:mi></mml:mrow></mml:msub><mml:mo>−</mml:mo><mml:msub><mml:mrow><mml:mi>L</mml:mi></mml:mrow><mml:mrow><mml:mi>τ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> gauge-symmetric model at Belle
Search for in the gauge-symmetric model at Belle Open
We search for a new gauge boson Z′ that couples only to heavy leptons and their corresponding neutrinos in the process e+e-→Z′(→μ+μ-)μ+μ-, using a 643 fb-1 data sample collected by the Belle experiment at or near the ϒ(1S,2S,3S,4S,5S) reso…
View article: Study of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi><mml:mi>γ</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>γ</mml:mi><mml:mi>ψ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>2</mml:mn><mml:mi>S</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math> at Belle
Study of at Belle Open
Using 980 fb-1 of data at and around the Υ(nS)(n = 1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetric-energy e+e- collider, the two-photon process γγ → γψ(2S) is studied from the threshold to 4.2 …
View article: Measurement of the branching fraction and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> asymmetry for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mover accent="true"><mml:mi>D</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mn>0</mml:mn></mml:msup><mml:mi>π</mml:mi></mml:math> decays
Measurement of the branching fraction and asymmetry for decays Open
We measure the branching fractions and CP asymmetries for the decays B0→ D¯0π0 and B+→ D¯0π+, using a data sample of 772 × 106 BB¯ pairs collected at t…
View article: An improved search for the electric dipole moment of the τ lepton
An improved search for the electric dipole moment of the τ lepton Open
View article: Measurement of the cluster position resolution of the Belle II Silicon Vertex Detector
Measurement of the cluster position resolution of the Belle II Silicon Vertex Detector Open
View article: Measurement of the branching fraction and $CP$ asymmetry for $B\to\bar{D}^{0} \pi$ decays
Measurement of the branching fraction and $CP$ asymmetry for $B\to\bar{D}^{0} \pi$ decays Open
We measure the branching fractions and CP asymmetries for the decays B0→¯D0π0 and B+→¯D0π+, using a data sample of 772×106 B¯B pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB e+e− collider. The branching fraction…
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: The Silicon Vertex Detector of the Belle II Experiment
The Silicon Vertex Detector of the Belle II Experiment Open
In 2019 the Belle II experiment started data taking at the asymmetric\nSuperKEKB collider (KEK, Japan) operating at the Y(4S) resonance. Belle II will\nsearch for new physics beyond the Standard Model by collecting an integrated\nluminosit…
Measurements of the Branching Fractions of the Semileptonic Decays and the Asymmetry Parameter of Open
View article: Search for the decay <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:mi>η</mml:mi></mml:math>
Search for the decay Open
We report the results of the first search for the decay $B_s^0 \rightarrow \eta^\prime \eta$ using $121.4~\textrm{fb}^{-1}$ of data collected at the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ co…
View article: Measurements of partial branching fractions of inclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msub><mml:mi>X</mml:mi><mml:mi>u</mml:mi></mml:msub><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>+</mml:mo></mml:msup><mml:msub><mml:mi>ν</mml:mi><mml:mo>ℓ</mml:mo></mml:msub></mml:math> decays with hadronic tagging
Measurements of partial branching fractions of inclusive decays with hadronic tagging Open
We present measurements of partial branching fractions of inclusive semileptonic $B \to X_u \, \ell^+\, \nu_{\ell}$ decays using the full Belle data set of 711 fb$^{-1}$ of integrated luminosity at the $\Upsilon(4S)$ resonance and for $\el…
View article: Search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:msub><mml:mi>X</mml:mi><mml:mrow><mml:mi>s</mml:mi><mml:mover accent="true"><mml:mi>s</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover></mml:mrow></mml:msub></mml:math> at Belle using a semi-inclusive method
Search for at Belle using a semi-inclusive method Open
We report the first search for the penguin-dominated process $B_{s}^{0} \rightarrow \eta^{\prime} X_{s\bar{s}}$ using a semi-inclusive method. A 121.4 fb$^{-1}$ integrated luminosity $ϒ$(5S) data set collected by the Belle experiment, at t…
View article: A Study of Hit-time Reconstruction of Belle II Silicon Vertex Detector
A Study of Hit-time Reconstruction of Belle II Silicon Vertex Detector Open
For stable operation of the Belle II Silicon Vertex Detector in the future high-luminosity operation of SuperKEKB, we plan to reduce readout data-samples per trigger and to apply hit-selection using hit-time. To realize this plan, we devel…
View article: Particle Identification in Belle II Silicon Vertex Detector
Particle Identification in Belle II Silicon Vertex Detector Open
We report a particle identification (PID) tool developed using energy-loss information in the silicon-strip vertex detector (SVD) of Belle II for charged pions, kaons, and protons using \\(D^{* + } \\to D^{0}[ \\to K^{ - }\\pi ^{ + }]\\pi …
View article: The Belle II Silicon Vertex Detector: Performance and Operational Experience in the First Year of Data Taking
The Belle II Silicon Vertex Detector: Performance and Operational Experience in the First Year of Data Taking Open
In spring 2019 the Belle II experiment at the high-luminosity SuperKEKB e+e− collider (KEK, Japan) has resumed operation after the installation of the new vertex detector. In the first period of operation SuperKEKB has already reached the …
Measurement of branching fractions and asymmetries for and decays at Belle Open
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: Measurements of the branching fractions of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mrow><mml:mi mathvariant="normal">Λ</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mi>p</mml:mi><mml:mi>η</mml:mi></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>c</mml:mi><mml:mo>+</mml:mo></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mi>p</mml:mi><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>decays at Belle
Measurements of the branching fractions ofanddecays at Belle Open
We report measurements of the branching fractions of singly Cabibbo-suppressed decays $\Lambda_c^+ \to p \eta$ and $\Lambda_c^+ \to p \pi^0$ using the full Belle data sample corresponding to an integrated luminosity of 980.6 $\rm fb^{-1}$.…
View article: The Belle II Silicon Vertex Detector: Performance and Running Experience
The Belle II Silicon Vertex Detector: Performance and Running Experience Open
In spring 2019 the fully equipped Belle II experiment started data taking at the energy of the Y(4S) resonance. The new vertex detector (VXD) consists of two inner layers of DEPFET pixels (PXD) and four outer layers of double-sided silicon…
View article: Search for the dark photon in B0 → A′A′, A′ → e+e−, μ+μ−, and π+π− decays at Belle
Search for the dark photon in B0 → A′A′, A′ → e+e−, μ+μ−, and π+π− decays at Belle Open
View article: Evidence for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>X</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>3872</mml:mn><mml:mo stretchy="false">)</mml:mo><mml:mo stretchy="false">→</mml:mo><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>ψ</mml:mi><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> Produced in Single-Tag Two-Photon Interactions
Evidence for Produced in Single-Tag Two-Photon Interactions Open
We report the first evidence for $X(3872)$ production in two-photon interactions by tagging either the electron or the position in the final state, exploring the highly virtual photon region. The search is performed in $e^+e^- \rightarrow …
Measurement of branching fractions of , , , and Open
View article: Test of lepton flavor universality and search for lepton flavor violation in B → Kℓℓ decays
Test of lepton flavor universality and search for lepton flavor violation in B → Kℓℓ decays Open
View article: The Belle II diamond-detector for radiation monitoring and beam abort
The Belle II diamond-detector for radiation monitoring and beam abort Open
The SuperKEKB electron-positron collider at the KEK laboratory in Japan aims to achieve a maximum luminosity 50$\\times$ higher than its predecessors KEKB and PEPII, positioning the Belle II experiment at the forefront of searches for non-…
View article: The study of $\gamma\gamma\to\gamma\psi(2S)$ at Belle
The study of $\gamma\gamma\to\gamma\psi(2S)$ at Belle Open
Using $980~\rm fb^{-1}$ of data on and around the $\Upsilon(nS)(n=1,2,3,4,5)$ resonances collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, the two-photon process $\gamma\gamma\to \gamma\psi(2S)$ is studied …
View article: Measurements of the branching fractions of semileptonic decays $\Xi_{c}^{0} \to \Xi^{-} \ell^{+} \nu_{\ell}$ and asymmetry parameter of $\Xi_{c}^{0} \to \Xi^{-} \pi^{+}$ decay
Measurements of the branching fractions of semileptonic decays $\Xi_{c}^{0} \to \Xi^{-} \ell^{+} \nu_{\ell}$ and asymmetry parameter of $\Xi_{c}^{0} \to \Xi^{-} \pi^{+}$ decay Open
Using a data sample of 89.5 fb$^{-1}$ recorded at the energy $\sqrt{s}=10.52$ GeV with the Belle detector at the KEKB $e^+e^-$ collider, we report measurements of branching fractions of semileptonic decays $\Xi_{c}^{0} \to \Xi^{-} \ell^{+}…