A5000816390- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Geological Modeling and Analysis
- CCD and CMOS Imaging Sensors
- Atomic and Subatomic Physics Research
- Geotechnical and Geomechanical Engineering
- Distributed and Parallel Computing Systems
- Advanced Aircraft Design and Technologies
- Atmospheric aerosols and clouds
- Cold Atom Physics and Bose-Einstein Condensates
- Neutrino Physics Research
- Nuclear physics research studies
- Air Traffic Management and Optimization
- Electron and X-Ray Spectroscopy Techniques
- Aviation Industry Analysis and Trends
- Astrophysics and Cosmic Phenomena
- Meteorological Phenomena and Simulations
The University of Melbourne
2017-2020
École Polytechnique
2020
Centre National de la Recherche Scientifique
2020
Laboratoire de Météorologie Dynamique
2020
Sorbonne Université
2020
Institut Pierre-Simon Laplace
2020
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2018-2019
University of Pisa
2018-2019
The experimental results on the ratios of branching fractions R(D)=B(B[over ¯]→Dτ^{-}ν[over ¯]_{τ})/B(B[over ¯]→Dℓ^{-}ν[over ¯]_{ℓ}) and R(D^{*})=B(B[over ¯]→D^{*}τ^{-}ν[over ¯]→D^{*}ℓ^{-}ν[over ¯]_{ℓ}), where ℓ denotes an electron or a muon, show long-standing discrepancy with standard model predictions, might hint at violation lepton flavor universality. We report new simultaneous measurement R(D) R(D^{*}), based data sample containing 772×10^{6} BB[over ¯] events recorded ϒ(4S) resonance...
We report the first measurement of $D^{\ast -}$ meson polarization in decay $B^0 \to D^{*-} \tau^+\nu_{\tau}$ using full data sample 772$\times 10^6$ $B\bar{B}$ pairs recorded with Belle detector at KEKB electron-positron collider. Our result, $F_L^{D^\ast} = 0.60 \pm 0.08 ({\rm stat}) 0.04 sys})$, where $F_L^{D^\ast}$ denotes $D^{\ast-}$ longitudinal fraction, agrees within about $1.7$ standard deviations model prediction.
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 deutron-ion collisions, which not yet fully understood. In heavy-ion hydrodynamic expansion Quark-Gluon Plasma one possible explanations origin ridge signal. Measurements $e^+e^-$ collision system, without complexities introduced by hadron structure initial...
We present a first measurement of the $\bar{B^{0}} \rightarrow D^{*+} \ell^{-} ν_{\ell}$ branching fraction using fully reconstructed $B$ meson decays employing Full Event Interpretation algorithm. Collision events corresponding to an integrated luminosity \lumi are analyzed, which were recorded by Belle~II detector operated at SuperKEKB accelerator complex. measure$\cal{B}(\bar{B^{0}} ν_{\ell}) =4.51 \pm 0.41_{stat}\pm0.27_{syst} \pm0.45_{π_s}$, with and second error denoting statistical...
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...
We present the results of re-discovery decay $B^0 \to \pi^- \ell^+ \nu_\ell$ in 34.6 fb$^{-1}$ Belle II data using hadronic $B$-tagging via Full Event Interpretation algorithm. observe 21 signal events on a background 155 fit to distribution square missing mass, $M_{\mathrm{miss}}^2$, with significance 5.69$\sigma$, and determine total branching fraction (1.58 $\pm$ 0.43$_{\mathrm{stat}}$ 0.07$_{\mathrm{sys}}$) $\times 10^{-4}$.
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 construction of the new accelerator at Super Flavor Factory in Tsukuba, Japan, has been finalized and commissioning its detector (Belle II) started. This e$^{+}$e$^{-}$ machine (SuperKEKB) will deliver an instantaneous luminosity $8\times10^{35}\mathrm{~cm}^{-2}\mathrm{s}^{-1}$, which is 40 times higher than world record set by KEKB. In order to be able fully exploit increased number events provide high precision measurements decay vertex B meson systems such a harsh environment, Belle...
We present measurements of the first six hadronic mass moments in semileptonic $B \rightarrow X_c \ell ν$ decays. The moments, together with other observables inclusive $B$ decays, can be used to determine CKM matrix element $|{V_{cb}}|$ and $b$-quark $m_b$ context Heavy Quark Expansions QCD. Belle~II data recorded at $Υ(4S)$ resonance 2019 2020 (March-July), corresponding an integrated luminosity $34.6\;\mathrm{fb}^{-1}$, is for this measurement. decay $Υ(4S) B \overline{B}$ reconstructed...
We report measurements related to hadronic $B$ decays final states that contain charm mesons. The analyses are performed on a $62.8~\mathrm{fb}^{-1}$ data set collected by the Belle II experiment at center-of-mass energy corresponding mass of $Υ(4S)$ resonance. reported for decay modes $B^-\to D^0 h^-$, $B^{-}\to D^{*0}h^-$, $\bar{B}^{0}\to D^{+} h^{-}$ and D^{*+} h^{-}$, where $h=π$ or $K$. These either signal control channels unitarity triangle angle $γ$ in direct time-dependent...
We report on the first measurement of direct $CP$-violating asymmetry ($\mathcal{A}$) in charmless decay $B^0 \to K^0π^0$ at Belle II and an updated its branching fraction ($\mathcal{B}$). use a sample electron-positron collisions collected 2019 2020 $Υ(4S)$ resonance corresponding to $62.8$ $\text{fb}^{-1}$ integrated luminosity. reconstruct select about $50$ K_S^0 π^0$ candidates, we measure $\mathcal{A}_{K^0π^0} = -0.40_{-0.44}^{+0.46} (\text{stat}) \pm 0.04 (\text{syst})$...
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...
The Silicon Vertex Detector of the Belle II Experiment at KEK in Tsukuba, Japan, consists 172 double-sided strip sensors. They are read out by 1748 APV25 chips, and analog data sent radiation zone to 48 modules which convert them digital. FPGAs then compensate line signal distortions using digital finite impulse response filters detect frames from incoming stream. Then they perform pedestal subtraction, common mode correction zero suppression, as well calculate peak timing amplitude each...
We report measurements of the $\bar{B}^0 \to D^{*+} \ell^{-} \barν_l$ and $B^- D^{0} processes using 34.6 fb$^{-1}$ collision events recorded by Belle II experiment at SuperKEKB asymmetric-energy $e^+ e^-$ collider. For $B^-\to D^{0}\ell^-\barν_\ell$ channel, we present first studies that isolate this decay from other semileptonic backgrounds. a measurement branching fraction obtain ${\cal B}(\bar{B}^0 \barν_l) = \left(4.60 \pm 0.05_{\mathrm{stat}}\pm0.17_{\mathrm{syst}} 0.45_{π_s}\right)...
We utilize a sample of 34.6 fb$^{-1}$, collected by the Belle II experiment at SuperKEKB asymmetric energy $e^+e^-$ collider, to search for $B^+ \to ϕK^+$, ϕK^{*+}$, $B^0 ϕK^0_S$, and ϕK^{*0}$ decays. Charmless hadronic $B$ decays represent an important part physics program, are ideal benchmark test detector capabilities in terms tracking efficiency, charged particle identification, vertexing, advanced analysis techniques. Each channel is observed with significance that exceeds 5 standard...
Tag-side reconstruction is an important method for reconstructing $B$ meson decays with missing energy. The Belle II tag-side algorithm, Full Event Interpretation, relies on a hierarchical of multivariate classification employed at each stage reconstruction. Given the large numbers classifiers and decay chains reconstructed, performance algorithm data simulation differs significantly. Here, calibration factors are derived hadronic by measuring signal side decay, $B \rightarrow X\ell ν$, in...
The Silicon Vertex Detector (SVD) is one of the main detectors in Belle II experiment at KEK, Japan. In combination with a pixel detector, SVD determines precise decay vertex and low-momentum track reconstruction. ladders are being developed several institutes. For development tracking algorithm as well performance estimation ladders, beam tests for were performed. We report an overview development, its measured test, prospect assembly commissioning until installation.
We report the measurement of branching fraction and $CP$ asymmetry for $\bar{B}^{0}(B^{0})\to K^{0}_{S}K^{\mp}π^{\pm}$ decay. The analysis is performed on a data sample 711 $\rm{fb}^{-1}$ collected at $Υ(4S)$ resonance with Belle detector KEKB asymmetric-energy $e^{+}e^{-}$ collider. obtain $(3.60\pm0.33\pm0.15)\times10^{-6}$ an $\mathcal{A}_{CP}$ $(-8.5\pm8.9\pm0.2)\%$, where first uncertainties are statistical second systematic. Hints peaking structures also observed in differential as...