Belle II Document Server 286 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
1. $B \rightarrow D^{**} \ell \nu $ Analysis at Belle II / Eylül Ünlü [BELLE2-TALK-CONF-2024-019] 12 minutes (plus 3 minutes for questions)
27 February 2024
There is currently some tension between the measured value of $R(D^{*})=\mathcal{B}(B \rightarrow D^{*} \tau \nu_{\tau})/ \mathcal{B}(B \rightarrow D^{*} \ell \nu_{\ell})$ and the Standard Model prediction, hinting at lepton universality violation. [...]
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2. Graph Neural Network based Hit Classification for Tracking at Belle II / Greta Heine ; Torben Ferber ; Lea Reuter ; Slavomira Stefkova [BELLE2-TALK-CONF-2024-018] 12min
26 February 2024
/ DPG Spring Meeting 2024
Over the next few years, the Belle II Experiment will increase its instantaneous luminosity, which will also lead to a significant increase in the beam background, affecting the efficiency of both online and offline tracking algorithms. [...]
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3. Direct measurement of 𝑅+-0 at Belle II / Florian Bernlochner, ; Jochen Dingfelder, ; Anna-Maria Heyn, ; Markus Prim, ; et al [BELLE2-TALK-CONF-2024-016]
26 February 2024
/ DPG 2024
The ratio of the ϒ(4𝑆) → 𝐵+𝐵− and ϒ(4𝑆) → 𝐵0 ¯𝐵0 decay rates, 𝑅±0, represents a crucial input quantity to convert measured yields into branching fractions at 𝑒+𝑒− 𝐵-factory experiments. [...]
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4. Sensitivity of magnetic monopole detection at the Belle II PXD / Matthäus Krein ; Katharina Dort ; Sören Lange [BELLE2-TALK-CONF-2024-015] 12 minutes
23 February 2024
/ DPG-Frühjahrstagung Karlsruhe
Particles with isolated magnetic charge, so-called magnetic monopoles, are of high experimental and theoretical interest. [...]
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5. Energy scan results from Belle II / Alexander E. Bondar [BELLE2-TALK-CONF-2024-014] 20 min
22 February 2024
/ QWG2024
Talk at QWG 2024. [...]
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6. Study of $B^{+} \to D_{s}^{(*)+}\pi^{0}$ mode at Belle / Manish Kumar ; Vishal Bhardwaj [BELLE2-CONF-PROC-2024-004]
15 January 2024

We present here the sensitivity study of the rare decay modes $B^{+} \to D_{s}^{+}\pi^{0}$ and $B^{+} \to D_{s}^{(\ast)+}\pi^{0}$, at Belle using a simulated sample. [...]
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7. Charm physics at Belle and Belle II experiments / Longke Li [BELLE2-TALK-CONF-2024-001]
11 January 2024
/ FTCF 2024
In this talk, I present some recent charm results at Belle and Belle II experiments, including the precise measurement of charm lifetimes, branching fractions and decay asymmetry parameter, searches for rare and forbidden decays (Xic semileptonic decay, BNV processes D->p l), and CPV searches for charm hadron decays (D four-body decays and Lambda_c singly Cabibbo-suppressed decays)..
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8. A test of lepton flavor universality with a measurement of $R(D^{*})$ using hadronic $B$ tagging at the Belle~II experiment / The Belle II Collaboration [BELLE2-NOTE-PH-2022-032] [BELLE2-PUB-DRAFT-2023-015] [BELLE2-PUB-PH-2024-001]
05 January 2024

The ratio of branching fractions $R(D^{*}) = \mathcal{B}(\overline{B} \rightarrow D^{*} \tau^{-} \overline{\nu}_{\tau})$/$\mathcal{B} (\overline{B} \rightarrow D^{*} \ell^{-} \overline{\nu}_{\ell})$, where $\ell$ is an electron or muon, is measured using a Belle~II data sample with an integrated luminosity of $189~\mathrm{fb}^{-1}$ at the SuperKEKB asymmetric-energy $e^{+} e^{-}$ collider. [...]
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9. Recent quarkonium results from Belle II / Renu Garg [BELLE2-CONF-PROC-2024-002]
02 January 2024

The Belle II experiment at the SuperKEKB energy-asymmetric $e^+e^-$ collider is the upgraded successor of the $B$-factory facility at the KEK laboratory, Japan [...]
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10. Rare decays at Belle and Belle II / Seema Choudhury [BELLE2-CONF-PROC-2023-050]
30 December 2023

We present the recent results of the rare decays from the Belle and Belle II experiments, collected at the Y(4S) resonance. [...]
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