A5032318253- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- High-Energy Particle Collisions Research
- CCD and CMOS Imaging Sensors
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Scientific Computing and Data Management
- Calibration and Measurement Techniques
- Electron and X-Ray Spectroscopy Techniques
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Radioactive Decay and Measurement Techniques
- Image Processing and 3D Reconstruction
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Advanced MEMS and NEMS Technologies
- Artificial Intelligence in Games
- Natural Language Processing Techniques
Bose Institute
2014-2021
In this article, we revisit the complexity of reconfiguration independent sets under token sliding rule on chordal graphs. \textsc{Token Sliding-Connectivity} problem, input is a graph $G$ and an integer $k$, objective to determine whether $TS_k(G)$ connected. The vertices are $k$-independent $G$, two adjacent if only one can transform corresponding into other by vertex (also called \emph{token}) along edge. Bonamy Bousquet [WG'17] proved that problem polynomial-time solvable interval graphs...
We estimate chemical freeze-out parameters in Hadron Resonance Gas (HRG) and Excluded Volume HRG (EVHRG) models by fitting the experimental information of net-proton net-charge fluctuations measured Au + collisions STAR Collaboration at BNL Relativistic Heavy Ion Collider (RHIC). observe that obtained from lower higher order are almost same for $\sqrt{{s}_{\mathit{NN}}}>27$ GeV, but tend to deviate each other $\sqrt{{s}_{\mathit{NN}}}$. Moreover, these separations increase with decrease...
The main aim of the study is to perform long-term stability test gain single mask triple GEM detector. A simple method used for this using a radioactive X-ray source with high activity. continued till accumulation charge per unit area > 12.0 mC/mm2. details chamber fabrication, set-up, measurement and results are presented in paper.
A quad-GEM prototype is built and tested with Ar+CO2 gas in 70:30 ratio positive pressure at a flow rate of 100 ml/min. The detector Fe55 X-ray source generator. measurements are performed high gain preamplifier. energy resolution measured. anode current also measured for different configurations. detail results presented.
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...
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$_{\mathrm{sys}}$) $\times 10^{-4}$.
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 $\mathcal{A}_{K^0π^0} = -0.40_{-0.44}^{+0.46} (\text{stat}) \pm 0.04 (\text{syst})$...
A systematic study of the attenuation electromagnetic radiation in Nuclear Track Detectors (NTDs) is carried out. The gamma-ray, X-ray, UV, visible, and infrared NTDs are investigated using NaI(Tl) detector, Gas Electron Multiplier (GEM) UV-Vis spectrophotometer, FTIR spectrophotometer respectively. values some important parameters (e.g., optical depth, coefficient, etc.) three commercially available (PET, Makrofol r CR-39 ), at relevant region spectrum, determined. details experimental...
Study of the stability gain and energy resolution for a triple GEM detector has been performed under continuous radiation X-ray with high rate, using premixed gas Argon CO$_2$ in 70/30 ratio conventional NIM electronics. A strong Fe$^{55}$ source is used this study. The novelty study that test same to irradiate chamber monitor spectrum. not collimated point but exposed larger area. Effect temperature pressure on these parameters are also studied. detail method measurement first results...
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...
A scaler has been fabricated to count the signals from any radiation de- tector. It can of frequency up 140 kHz. Transistor Logic (TTL) is used in this scaler. In article details design, fabrication and operation processes presented.
We report on first measurements of branching fractions~($\mathcal{B}$) and CP-violating charge asymmetries~($\mathcal{A}$) in charmless $B$ decays at Belle~II. use a sample electron-positron collisions collected 2019 2020 the $\Upsilon(4S)$ resonance corresponding to $34.6$\,fb$^{-1}$ integrated luminosity. simulation determine optimized event selections. The $\Delta E$ distributions resulting samples, restricted $M_{\rm bc}$, are fit signal yields. Signal yields corrected for efficiencies...
Abstract A quad-GEM is particularly useful for its low ion back flow, excellent rate capability, good position resolution, high gain at relatively operating voltage in the next generation energy physics experiments. In this work, efficiency and uniformity of a prototype detector are studied. simple method used to estimate with help an oscilloscope as triggering storage device. An ≈ 95% obtained ΔV GEM ≥ 340 V using cosmic muons source. systematic study over active area done Fe 55 X-ray The...