J. Wiechczynski
A5018494086- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Medical Imaging Techniques and Applications
- Black Holes and Theoretical Physics
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- CCD and CMOS Imaging Sensors
- Advanced MRI Techniques and Applications
- Distributed and Parallel Computing Systems
- Cosmology and Gravitation Theories
- Particle accelerators and beam dynamics
- Power Line Communications and Noise
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Lanthanide and Transition Metal Complexes
- Biotin and Related Studies
Institute of Nuclear Physics, Polish Academy of Sciences
2015-2024
Université de Strasbourg
2020-2024
Centre National de la Recherche Scientifique
2020-2024
Nagoya University
2023-2024
Austrian Academy of Sciences
2024
Institute of High Energy Physics
2024
High Energy Accelerator Research Organization
2023
Panjab University
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2020-2022
Niigata University
2019-2020
We report a measurement of the exclusive ${B}^{+}$ meson decay to ${D}_{s}^{(*)\ensuremath{-}}{K}^{+}{\ensuremath{\pi}}^{+}$ final state using $657\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs collected at $\ensuremath{\Upsilon}(4S)$ resonance with Belle detector KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. use ${D}_{s}^{*\ensuremath{-}}\ensuremath{\rightarrow}{D}_{s}^{\ensuremath{-}}\ensuremath{\gamma}$ and...
Abstract The silicon vertex detector (SVD) is installed at the heart of Belle II experiment, taking data high-luminosity B-Factory SuperKEKB since 2019. SVD a four-layer double-sided strip with tracking and particle-identification capabilities. In this paper, we report on performance reconstruction hits. has shown stable above-99% hit efficiency, large signal-to-noise in all sensors beginning taking. Cluster position time resolution have been measured 2020 2022 show excellent stability....
The Belle II Silicon Vertex Detector comprises four layers of double-sided silicon strip detectors (DSSDs), consisting ladders with two to five sensors each. All are individually read out by APV25 chips the Origami chip-on-sensor concept for central DSSDs ladders. sit on flexible circuits that glued top sensors. This allows a low material budget and an efficient cooling single pipe per ladder. We present construction first SVD results from precision measurements electrical tests.
We report a measurement of the $B^0$ and $B^+$ meson decays to $D_s^-K^0_S \pi^+$ $D_s^- K^+K^+$ final states, respectively, using $657 \times 10^{6} B\overline{B}$ pairs collected at $\Upsilon(4S)$ resonance with Belle detector KEKB asymmetric-energy $e^+e^-$ collider. Using $D_s^-\to \phi\pi^-$, $K^{*}(892)^0 K^-$ $K^0_S decay modes for $D_s$ reconstruction, we measure following branching fractions: ${\cal B}(B^0\to D_s^{-}K^0_S\pi^+)=[0.47 \pm 0.06 (\mathrm {stat}) 0.05 {syst})]\times...
The Belle II experiment started data-taking in March 2019. silicon vertex detector (SVD), part of the tracking system, has been operating smoothly and reliably. data quality confirmed through various metrics such as a good signal-to-noise ratio precise spatial resolution. radiation damage effects have continuously monitored, showing agreement with our expectations. So far, no harmful impact due to on performance observed. Additionally, tolerance SVD sensors for future high-luminosity runs...
The upgrade of the Belle II experiment plans to use a vertex detector based on two different technologies, DEPFET pixel (PXD) technology and double side silicon microstrip (SVD) technology. electronics are characterized by topology SVD bias that forces design sophisticated grounding because floating power scheme. complex PXD cable bundle may introduce some noise inside area. This paper presents general overview EMC issues present in system, tests an prototype study propagation...
The Belle II VerteX Detector (VXD) is a 6 layers silicon tracker device that will cope with an unprecedented luminosity of 8×1035 cm−2s−1 achievable by the new SuperKEKB e+e− collider, at KEK laboratory (Tsukuba, Japan). All environment parameters such as temperature, humidity and radiation levels, must be constantly monitored under certain conditions action promptly taken, interlocking power supply or delivering abort signal to collider. In this contribution we describe VXD monitoring...
The Belle II experiment at the SuperKEKB asymmetric energy e+e− collider in KEK, Japan will operate an instantaneous luminosity 40 times larger than that of its predecessor, Belle. It is built with aim collecting a huge amount data (50 ab−1 by 2025) for precise CP violation measurements and new physics search. Thus, we need accurate vertex determination reconstruction low momentum tracks which be achieved help detector (VXD). VXD consists two layers DEPFET pixels (`Pixel Detector') four...
The Belle II experiment operating at the asymmetric-energy $e^+e^-$ SuperKEKB collider, located in Tsukuba (Japan), has been collecting data since March 2019. Its excellent vertexing abilities are provided by vertex detector, part of which is silicon-strip detector (SVD) that plays a crucial role charged-particle tracking close to interaction point. SVD operated successfully and efficiently over whole period taking so far. In this article, we briefly discuss its purpose, structure basic...
The Belle II experiment searches for beyond-the-standard-model physics using the detector and SuperKEKB collider. silicon vertex (SVD) is crucial particle tracking. After 1.5-year shutdown from June 2022, Run 2 began in January 2024; operation shows stable noise levels, high signal-to-noise ratios, hit efficiency over 99%. To manage higher beam background increased luminosity, new techniques such as hit-time selection cluster grouping are being developed. These methods increase acceptable...
At the beginning of 2024, data taking Belle II experiment resumed after long-shutdown 1, required to install a new two-layer DEPFET detector (PXD) and upgrade accelerator components. The whole silicon tracker (VXD) was extracted, two halves outer strip (SVD) were split for PXD insertion reconnected again. VXD commissioned start run. We will describe challenges this report on operational experience SVD performance obtained with first-year data. then introduce various improvements in...
Belle II is a multipurpose detector currently under construction which will be operated at the next generation B-factory SuberKEKB in Japan. Its main devices for vertex reconstruction are Silicon Vertex Detector (SVD) and Pixel (PXD). In April 2016 sector of SVD PXD have been tested beam high energetic electrons test facility DESY Hamburg (Germany). We report here results hit efficiency estimation measurement resolution silicon etector. find that efficiencies on average above 99.5% measured...