A5051733700- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Scientific Computing and Data Management
- Distributed and Parallel Computing Systems
- Muon and positron interactions and applications
- Nuclear physics research studies
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Cold Atom Physics and Bose-Einstein Condensates
- Electron and X-Ray Spectroscopy Techniques
High Energy Accelerator Research Organization
2020-2023
A. Alikhanyan National Laboratory
2023
University of the Basque Country
2018-2022
The University of Melbourne
2017-2022
Duke University
2022
Campbell Collaboration
2022
University of Bonn
2022
Chonnam National University
2018-2022
Beihang University
2018
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
2018
We present a measurement of angular observables, $P_4'$, $P_5'$, $P_6'$, $P_8'$, in the decay $B^0 \to K^\ast(892)^0 \ell^+ \ell^-$, where $\ell^+\ell^-$ is either $e^+e^-$ or $\mu^+\mu^-$. The analysis performed on data sample corresponding to an integrated luminosity $711~\mathrm{fb}^{-1}$ containing $772\times 10^{6}$ $B\bar B$ pairs, collected at $\Upsilon(4S)$ resonance with Belle detector asymmetric-energy collider KEKB. Four $P_{4,5,6,8}'$ are extracted five bins invariant mass...
We present a new measurement of the Cabibbo-Kobayashi-Maskawa matrix element $|{V}_{cb}|$ from ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}}$ decays, reconstructed with full Belle data set $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity. Two form factor parametrizations, originally conceived by Caprini-Lellouch-Neubert (CLN) and Boyd, Grinstein Lebed (BGL) groups, are used to extract product...
The precise determination of the CKM matrix element $\left| V_{cb}\right|$ is important for carrying out tests flavour sector Standard Model. In this article we present a preliminary analysis $\bar B^0 \to D^{*\,+} \, \ell^- \bar ν_\ell$ decay mode and its charge conjugate, selected in events that contain fully reconstructed $B$-meson, using 772 million $e^+ e^- Υ(4S) B B$ recorded by Belle detector at KEKB. Unfolded differential rates four kinematic variables describing $B$-meson rest frame...
We present a study of fits to exclusive ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}}$ measurements for the determination Cabibbo-Kobayashi-Maskawa matrix element magnitude $|{V}_{cb}|$, based on most recent Belle untagged measurement. Results are obtained with Caprini-Lellouch-Neubert (CLN) and Boyd-Grinstein-Lebed (BGL) form factor parametrizations, without inclusion preliminary lattice QCD (LQCD) factors at nonzero...
We present a measurement of the branching fractions Cabibbo favored ${\overline{B}}^{0}\ensuremath{\rightarrow}{D}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and suppressed ${\overline{B}}^{0}\ensuremath{\rightarrow}{D}^{+}{K}^{\ensuremath{-}}$ decays. find...
We report a study of radiative decays χ_{bJ}(1P)(J=0,1,2) mesons into 74 hadronic final states comprising charged and neutral pions, kaons, protons; out these, 41 modes are observed with at least 5 standard deviation significance. Our measurements not only improve the previous by CLEO Collaboration but also lead to first observations in many new modes. The large sample allows us probe total decay width χ_{b0}(1P). In absence statistically significant result, 90% confidence-level upper limit...
We report a search for $B^{0}\to ηη$ with data sample corresponding to an integrated luminosity of $698 \,{\rm fb}^{-1}$ containing $753 \times 10^{6}$ $B\bar{B}$ pairs collected at the $Υ(4S)$ resonance Belle detector KEKB asymmetric-energy $e^{+}e^{-}$ collider. The branching fraction is measured be $\mathcal{B}(B^{0} \to ηη) = (7.6^{+2.7 +1.4}_{-2.3 -1.6}) 10^{-7}$ level 3.3 standard deviations above zero, which provides first evidence decay $B^{0} ηη$.
In the Belle II experiment, an aerogel-based proximity focusing ring-imaging Cherenkov (ARICH) counter is used for charged particle identification (PID) in forward end-cap region. The goal to separate kaons from pions at above 4σ significance level momenta up 4 GeV/c, which critical measurements of rare B decays and CP violation decays. Chrerenkov photons are emitted aerogel tiles 144-channel Hybrid Avalanche Photo Detector (HAPDs) as photo-detectors. We utilize a two-layer design with...
The Belle~II experiment at the SuperKEKB $e^{+}e^{-}$ collider is successor to Belle experiment. instantaneous luminosity designed reach $ 6.5\times 10^{35}~\rm cm^{-2}s^{-1}$ and it aims record target integrated of $50~\rm ab^{-1}$ which 50 times more than that Belle. current has so far reached $213~\rm fb^{-1}$ by summer 2021. measure matrix elements Cabibbo-Kobayashi- Maskawa (CKM) their phases with unprecedented precision. With data, will be able discover New Physics beyond Standard...
Since 2018, an Proximity Focusing Aerogel Ring Imaging Detector (ARICH) efficiently separates hadrons in the forward end-cap of Belle II spectrometer. Cherenkov photons emitted double-layer aerogel radiator are expanded 16-cm space and detected on photon detector, which consists 420 hybrid avalanche photodiodes rear readout electronics operating threshold mode. Each sensors requires six different high voltages a supply four low for electronics. Because power dissipation, system also includes...
Measurements of leptonic and semileptonic $B$ meson decays are vital for the determination CKM matrix elements |$V_{cb}$| |$V_{ub}$|. This article presents measurements $B^{0}$ → $D^{∗}\ellν_{\ell}$, $B D^{(∗)}π\ellν$, η^{ (')}\ellν_{\ell}$ decay μ^{-}ν̄_{μ}$. These analyses use entire Belle data set collected at $\Upsilon(4S)$ resonance containing 772 million $B\bar{B}$ pairs.