G. B. Mohanty
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View article: Radiation damage study of Belle II silicon strip sensors with 90 MeV electron irradiation
Radiation damage study of Belle II silicon strip sensors with 90 MeV electron irradiation Open
The silicon strip sensors of the Belle II silicon vertex detector were irradiated with 90 MeV electron beams up to an equivalent 1-MeV-neutron fluence of $3.0\times 10^{13}~{\rm n}_{\rm eq}/{\rm cm^2}$. We measure changes in sensor propert…
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: Prompt and non-prompt production of charm hadrons in proton-proton collisions at the Large Hadron Collider using machine learning
Prompt and non-prompt production of charm hadrons in proton-proton collisions at the Large Hadron Collider using machine learning Open
In this contribution, we use machine learning (ML) based models to separate the prompt and non-prompt production of heavy flavour hadrons, such as $D^0$ and J/$ψ$, in proton-proton collisions at LHC energies. For this purpose, we use PYTHI…
View article: Machine learning-based study of open-charm hadrons in proton-proton collisions at the Large Hadron Collider
Machine learning-based study of open-charm hadrons in proton-proton collisions at the Large Hadron Collider Open
In proton-proton and heavy-ion collisions, the study of charm hadrons plays a pivotal role in understanding the QCD medium and provides an undisputed testing ground for the theory of strong interaction, as they are mostly produced in the e…
View article: Operational experience and performance of the Belle II silicon vertex detector after the first SuperKEKB long shutdown
Operational experience and performance of the Belle II silicon vertex detector after the first SuperKEKB long shutdown Open
The Belle II experiment searches for beyond-the-standard-model physics using the Belle II detector and SuperKEKB collider. The silicon vertex detector (SVD) is crucial for particle tracking. After the 1.5-year shutdown from June 2022, Run …
View article: Precision measurements of the top quark mass and decay width using CMS experiment
Precision measurements of the top quark mass and decay width using CMS experiment Open
We report precise measurements of the mass and decay width of the top quark in the $\\it{t}$-channel, which is the most dominant production process for single top quarks at the LHC. The final state comprises a top quark along with a light …
View article: Lepton flavour universality in 𝑾 boson decays
Lepton flavour universality in 𝑾 boson decays Open
The standard model (SM) predicts that the $W$ boson decays equally to all three flavours of leptons, known as lepton flavour universality. Many studies have been performed to measure the rate at which the $W$ boson decays to different flav…
View article: Search for Baryon-Number-Violating Processes in $B^-$ Decays to the $\barΞ_{c}^{0} \barΛ_{c}^{-}$ Final State
Search for Baryon-Number-Violating Processes in $B^-$ Decays to the $\barΞ_{c}^{0} \barΛ_{c}^{-}$ Final State Open
We report the results of the first search for $B^-$ decays to the $\barΞ_{c}^{0} \barΛ_{c}^{-}$ final state using 711~${\rm fb^{-1}}$ of data collected at the $Υ(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-…
View article: The Silicon Vertex Detector of the Belle II Experiment
The Silicon Vertex Detector of the Belle II Experiment Open
The Belle II experiment started data-taking in March 2019. \nThe silicon vertex detector (SVD), part of the Belle II tracking system, has been operating smoothly and reliably.\nThe data quality has been confirmed through various metrics su…
View article: Search for baryon and lepton number violating decays $\boldsymbol{D \rightarrow p\ell}$
Search for baryon and lepton number violating decays $\boldsymbol{D \rightarrow p\ell}$ Open
We search for the baryon and lepton number violating charm decays, $D \rightarrow p\ell$, where $D$ is either a $D^0$ or a $\overline{D}^0$ and $\ell$ is a muon or an electron, using a data sample of $921\,\mathrm{fb}^{-1}$ collected by th…
View article: Performance and running experience of the Belle II silicon vertex detector
Performance and running experience of the Belle II silicon vertex detector Open
The Belle II silicon vertex detector is one of the vertex detectors in the Belle II experiment. The detector reads out the signals from the double-sided silicon strip sensors with the APV25 front-end readout ASIC, adopting the chip-on-sens…
View article: The design, construction, operation and performance of the Belle II silicon vertex detector
The design, construction, operation and performance of the Belle II silicon vertex detector Open
The Silicon Vertex Detector of Belle II is a state-of-the-art tracking and vertexing system based on double-sided silicon strip sensors, designed and fabricated by a large international collaboration in the period 2012–2018. Since 2019 it …
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: Particle Identification in Belle II Silicon Vertex Detector
Particle Identification in Belle II Silicon Vertex Detector Open
We report a particle identification (PID) tool developed using energy-loss information in the silicon-strip vertex detector (SVD) of Belle II for charged pions, kaons, and protons using \\(D^{* + } \\to D^{0}[ \\to K^{ - }\\pi ^{ + }]\\pi …
View article: The Belle II Silicon Vertex Detector: Performance and Operational Experience in the First Year of Data Taking
The Belle II Silicon Vertex Detector: Performance and Operational Experience in the First Year of Data Taking Open
In spring 2019 the Belle II experiment at the high-luminosity SuperKEKB e+e− collider (KEK, Japan) has resumed operation after the installation of the new vertex detector. In the first period of operation SuperKEKB has already reached the …
View article: Search for Lepton Flavor, Lepton Number, and Baryon Number Violating Decay \(\tau \to p\ell \ell '\ (\ell ^{(' )} = \mu ,\text{e})\) at Belle
Search for Lepton Flavor, Lepton Number, and Baryon Number Violating Decay \(\tau \to p\ell \ell '\ (\ell ^{(' )} = \mu ,\text{e})\) at Belle Open
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View article: The study of $\gamma\gamma\to\gamma\psi(2S)$ at Belle
The study of $\gamma\gamma\to\gamma\psi(2S)$ at Belle Open
Using $980~\rm fb^{-1}$ of data on and around the $\Upsilon(nS)(n=1,2,3,4,5)$ resonances collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, the two-photon process $\gamma\gamma\to \gamma\psi(2S)$ is studied …
View article: Study of $e^+e^-\to \Upsilon(\rm1S,2S)\eta$ and $e^+e^-\to \Upsilon(\rm 1S)\eta^{\prime}$ at $\sqrt{s}=10.866$ GeV with the Belle detector
Study of $e^+e^-\to \Upsilon(\rm1S,2S)\eta$ and $e^+e^-\to \Upsilon(\rm 1S)\eta^{\prime}$ at $\sqrt{s}=10.866$ GeV with the Belle detector Open
We report the first observation of the processes $e^+e^-\to\Upsilon(\rm 1S,2S)\eta$ at $\sqrt{s}=10.866$~GeV with a $10.2\sigma$ and $16.5\sigma$ significance respectively. The measured Born cross sections are $\sigma(e^+e^- \to \Upsilon(2…
View article: Performance of the Belle II Silicon Vertex Detector
Performance of the Belle II Silicon Vertex Detector Open
The Belle II experiment at the SuperKEKB collider of KEK (Japan) will accumulate 50 ab$^{-1}$ of e$^+$e$^-$ collision data at an unprecedented instantaneous luminosity of 8 $\\times 10^{35}$ cm$^{-2}$s$^{-1}$, about 40 times larger than it…
View article: Performance Studies of the Belle II Silicon Vertex Detector
Performance Studies of the Belle II Silicon Vertex Detector Open
The Belle II experiment at the SuperKEKB asymmetric-energy e+e− collider in KEK, Japan will operate at an instantaneous luminosity of 8×1035 cm−2s−1, which is about 40 times larger than that of its predecessor, Belle. It is built with the …
View article: Machine learning: hit time finding with a neural network
Machine learning: hit time finding with a neural network Open
At the High Energy Accelerator Research Organization (KEK) in Tsukuba, Japan, the double-sided silicon strip sub-detector of the Belle II experiment is read out by 1748 APV25 chips. FPGAs perform several calculations on the digitized signa…