S. Nishida
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View article: Search for lepton-flavor-violating tau decays to ℓα at Belle
Search for lepton-flavor-violating tau decays to ℓα at Belle Open
A bstract We report a search for the lepton-flavor-violating decays τ ± → ℓ ± α ( ℓ = e , μ ), where α is an undetected spin-0 particle, such as an axion-like particle using 736 × 10 6 tau lepton pairs collected by the Belle detector at th…
View article: Search for $h_b(2P)\toγχ_{bJ}(1P)$ at $\sqrt{s} = 10.860$ GeV
Search for $h_b(2P)\toγχ_{bJ}(1P)$ at $\sqrt{s} = 10.860$ GeV Open
In the bottomonium sector, the hindered magnetic dipole (M1) transitions between P-wave states $h_b(2P) \rightarrow χ_{bJ}(1P) γ$, $J=0, \, 1, \, 2$, are expected to be severely suppressed according to the Relativized Quark Model, due to t…
View article: Search for charmed baryons in the $Λ_c^+η$ system and measurement of the branching fractions of $Λ_c(2880)^+$ and $Λ_c(2940)^+$ decaying to $Λ_c^+η$ and $pD^0$ relative to $Σ_c(2455)π$
Search for charmed baryons in the $Λ_c^+η$ system and measurement of the branching fractions of $Λ_c(2880)^+$ and $Λ_c(2940)^+$ decaying to $Λ_c^+η$ and $pD^0$ relative to $Σ_c(2455)π$ Open
We search for excited charmed baryons in the $Λ_c^+η$ system using a data sample corresponding to an integrated luminosity of 980 $\rm fb^{-1}$. The data were collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy col…
View article: Search for Two-Body $B$ Meson Decays to $Λ^{0}$ and $Ω^{(*)0}_{c}$
Search for Two-Body $B$ Meson Decays to $Λ^{0}$ and $Ω^{(*)0}_{c}$ Open
We report the results of the first search for Standard Model and baryon-number-violating two-body decays of the neutral $B$ mesons to $Λ^{0}$ and $Ω^{(*)0}_c$ using 711~${\rm fb^{-1}}$ of data collected at the $Υ(4S)$ resonance with the Be…
View article: Search for charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays at Belle
Search for charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays at Belle Open
A bstract We report a search for the charged-lepton flavor violation in Υ(2 S ) → ℓ ∓ τ ± ( ℓ = e, μ ) decays using a 25 fb − 1 Υ(2 S ) sample collected by the Belle detector at the KEKB e + e − asymmetric-energy collider. We find no evide…
View article: Search for charged-lepton flavor violation in $Υ(2S) \to \ell^\mpτ^\pm$ ($\ell=e,μ$) decays at Belle
Search for charged-lepton flavor violation in $Υ(2S) \to \ell^\mpτ^\pm$ ($\ell=e,μ$) decays at Belle Open
We report a search for the charged-lepton flavor violation in $Υ(2S) \to \ell^\mpτ^\pm$ ($\ell=e,μ$) decays using a $25~\fbi$ $Υ(2S)$ sample collected by the Belle detector at the KEKB $e^{+}$$e^-$ asymmetric-energy collider. We find no ev…
View article: Search for $$ {\textrm{B}}_{\textrm{s}}^0 $$ → ℓ∓τ± with the semi-leptonic tagging method at Belle
Search for $$ {\textrm{B}}_{\textrm{s}}^0 $$ → ℓ∓τ± with the semi-leptonic tagging method at Belle Open
A bstract We present a search for the lepton-flavor-violating decays $$ {B}_s^0 $$ → ℓ ∓ τ ± , where ℓ = e, μ , using the full data sample of 121 fb − 1 collected at the Υ(5 S ) resonance with the Belle detector at the KEKB asymmetric…
View article: Slow control of the Belle II Aerogel Ring Imaging detector
Slow control of the Belle II Aerogel Ring Imaging detector Open
Since 2018, an Proximity Focusing Aerogel Ring Imaging Detector (ARICH) efficiently separates hadrons in the forward end-cap of the Belle II spectrometer. Cherenkov photons emitted in the double-layer aerogel radiator are expanded in 16-cm…
View article: Recent results from the Belle II experiment
Recent results from the Belle II experiment Open
Belle~II is a flavor physics experiment at the SuperKEKB $e^+e^-$ collider. It has accumulated $380~\mathrm{fb}^{-1}$ of data as of May 2022, and has obtained several results with the world's best precision or sensitivity. Recent results m…
View article: Search for $B{}^0_s \rightarrow \ell^{\mp} τ^{\pm}$ with the Semi-leptonic Tagging Method at Belle
Search for $B{}^0_s \rightarrow \ell^{\mp} τ^{\pm}$ with the Semi-leptonic Tagging Method at Belle Open
We present a search for the lepton-flavor-violating decays $B{}^0_s \rightarrow \ell^{\mp}τ^{\pm}$, where $\ell = e, μ$, using the full data sample of $121~\mathrm{fb}^{-1}$ collected at the $Υ(5S)$ resonance with the Belle detector at the…
View article: Operation and Performance of Belle II Aerogel RICH Counter
Operation and Performance of Belle II Aerogel RICH Counter Open
The Belle II experiment at the SuperKEKB aims at collecting 50 times more data than its predecessor Belle. One of the key components in the experiment is the particle identification (PID), especially the separation of kaons and pions. In t…
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: Electroweak Penguin Decays of <i>b</i>-Flavored Hadrons
Electroweak Penguin Decays of <i>b</i>-Flavored Hadrons Open
In the past decade, electroweak penguin decays have provided a number of precision measurements and have become one of the most competitive ways to search for New Physics describing phenomena beyond the Standard Model. An overview of the m…
View article: Electroweak Penguin Decays of $b$-Flavoured Hadrons
Electroweak Penguin Decays of $b$-Flavoured Hadrons Open
In the past decade, electroweak penguin decays have provided a number of precision measurements, turning into one of the most competitive ways to search for New Physics that describe beyond the Standard Model phenomena. An overview of the …
View article: Study of electroweak penguin B decays at Belle II experiment
Study of electroweak penguin B decays at Belle II experiment Open
The electroweak b → sll ( l = e, µ ) transition is a flavor-changing neutral current process that mediates through a one-loop penguin diagram. The decay is considered to be a good probe for the New Physics as particles predicted in the bey…
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…
View article: Frame-Level Intermodular Configuration Scrubbing of On-Detector FPGAs for the ARICH at Belle II
Frame-Level Intermodular Configuration Scrubbing of On-Detector FPGAs for the ARICH at Belle II Open
On-detector digital electronics in High-Energy Physics experiments is increasingly being implemented by means of SRAM-based FPGA, due to their capabilities of reconfiguration, real-time processing and multi-gigabit data transfer. Radiation…
View article: Genome-Wide Profiling of WRKY Genes Involved in Benzylisoquinoline Alkaloid Biosynthesis in California Poppy (Eschscholzia californica)
Genome-Wide Profiling of WRKY Genes Involved in Benzylisoquinoline Alkaloid Biosynthesis in California Poppy (Eschscholzia californica) Open
Transcription factors of the WRKY family play pivotal roles in plant defense responses, including the biosynthesis of specialized metabolites. Based on the previous findings of WRKY proteins regulating benzylisoquinoline alkaloid (BIA) bio…
View article: Intermodular Configuration Scrubbing of On-detector FPGAs for the ARICH at Belle II
Intermodular Configuration Scrubbing of On-detector FPGAs for the ARICH at Belle II Open
On-detector digital electronics in High-Energy Physics experiments is increasingly being implemented by means of SRAM-based FPGA, due to their capabilities of reconfiguration, real-time processing and multi-gigabit data transfer. Radiation…
View article: Genome-wide identification of AP2/ERF transcription factor-encoding genes in California poppy (Eschscholzia californica) and their expression profiles in response to methyl jasmonate
Genome-wide identification of AP2/ERF transcription factor-encoding genes in California poppy (Eschscholzia californica) and their expression profiles in response to methyl jasmonate Open
With respect to the biosynthesis of plant alkaloids, that of benzylisoquinoline alkaloids (BIAs) has been the most investigated at the molecular level. Previous investigations have shown that the biosynthesis of BIAs is comprehensively reg…
View article: The Aerogel RICH detector of the Belle II experiment
The Aerogel RICH detector of the Belle II experiment Open
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View article: Performance evaluation of the aerogel RICH counter for the Belle II spectrometer using early beam collision data
Performance evaluation of the aerogel RICH counter for the Belle II spectrometer using early beam collision data Open
The Aerogel Ring Imaging Cherenkov (ARICH) counter serves as a particle identification device in the forward end-cap region of the Belle II spectrometer. It is capable of identifying pions and kaons with momenta up to $4\>$GeV$\>$c$^…
View article: Update of inclusive cross sections of single and pairs of identified light charged hadrons
Update of inclusive cross sections of single and pairs of identified light charged hadrons Open
We report new measurements of the production cross sections of pairs of charged pions and kaons as a function of their fractional energies using various fractional-energy definitions. Two different fractional-energy definitions were used a…
View article: CKM and CP Constraints from B-Decays
CKM and CP Constraints from B-Decays Open
Study of CP violation and the precise measurements of the Cabibbo-Kobayashi-Maskawa (CKM) provide test of the Standard Model. Recent measurements on angles and sides of the unitarity triangle such as phi_1, phi_3, phi_s, |V_{cb}| from ATLA…
View article: Performance Estimation of the Belle II Aerogel RICH Counter in the First Beam Collision
Performance Estimation of the Belle II Aerogel RICH Counter in the First Beam Collision Open
The Belle II experiment at the SuperKEKB facility started the beam collision in 2018, aiming search for the New Physics beyond the Standard Model.The Aerogel Ring Imaging Cherenkov (ARICH) counter is a particle identification (PID) device …
View article: The Silicon Vertex Detector of the Belle II Experiment
The Silicon Vertex Detector of the Belle II Experiment Open
The silicon vertex detector (SVD) for the Belle II experiment at the SuperKEKB accelerator in Japan is responsible for detecting particle's origins. It comprises four cylindrical layers with ladder-like double-sided silicon detector (DSSD)…