Belle II Document Server 4 records found  Search took 0.09 seconds. 
1. R(D*) at Belle II / Qi-Dong Zhou [BELLE2-TALK-DRAFT-2023-006] [BELLE2-TALK-CONF-2023-014]
09 February 2023
/ 7th KEK Flavour-Factory Workshop
Measurement of branching ratio $R(D^{*})$ of $B \rightarrow D^{*} \tau \nu_{\tau}$ relative to $B \rightarrow D^{*} \ell \nu_{\ell}$ decays with hadronic tagging is performed by using data sample of $198 \times 10^{6}$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle~II detector at the SuperKEKB asymmetric-energy $e^{+}e^{-}$ collider [...]
Fulltext: Download fulltextPDF;
2. $R(D^{*})$ measurement using the hadronic tag algorithm at the Belle II experiment / Kazuki Kojima ; Toru Iijima ; Qi-Dong Zhou ; Kodai Matsuoka ; et al [BELLE2-NOTE-PH-2022-032] [BELLE2-TALK-DRAFT-2022-137] [BELLE2-TALK-CONF-2022-111] 20 minutes (15 minutes presentation + 5 minutes Q&A) ; ;
06 September 2022
/ The 2022 Autumn Meeting of the Physical Society of Japan
In the semileptonic decay of $B$ mesons, the global average of $R(D^{*})$ measurement deviates from the Standard Model by $3.3\sigma$. [...]
Belle II Note: Download fulltextPDF; Slide in Japanese: Download fulltextPDF;
3. Recent results from Belle II / Qi-Dong Zhou [BELLE2-TALK-CONF-2022-041] 30 mins
18 May 2022
/ 21st International Symposium on Very High Energy Cosmic Ray Interactions
The Belle II experiment at the SuperKEKB energy-asymmetric 𝑒+𝑒− collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. [...]
Fulltext: VERSION_0 - Download fulltextPDF; VERSION_1 - Download fulltextPDF;
4. CKM measurements at the Belle II experiment / Qi-Dong Zhou [BELLE2-TALK-DRAFT-2021-075] [BELLE2-TALK-CONF-2021-054]
07 June 2021
/ FPCP 2021
This talk will report the measurements of CKM elements and unitarity triangle involving decays of B mesons performed with recent Belle II data-set. [...]
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