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1.
| Searches for dark sector particles at Belle and Belle II
/ Rajesh Kumar Maiti
[BELLE2-CONF-PROC-2024-028]
11 November 2024
Belle and Belle II experiments gathered around 1.5 ab$^{-1}$ of dataset near $\Upsilon(nS)$ resonances, which have constrained kinematics and low multiplicity suitable for dark sector searches. [...]
External link:  Fulltext |
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2.
| Searches for Dark Sector Particles at Belle and Belle II
/ Doris Yangsoo Kim
[BELLE2-TALK-DRAFT-2024-100]
[BELLE2-TALK-CONF-2024-089]
16 min + 4 min Q & A
11 July 2024
/ IDM 2024
The Belle and Belle II experiment have collected samples of e+ e- collision data at centre-of-mass energies near the Upsilon(nS) resonances. [...]
Fulltext: PDF; |
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3.
| The DMAPS upgrade of the Belle II Vertex Detector
/ Giuliana Rizzo, INFN and University, Pisa ; Belle II VTX Upgrade Group
[BELLE2-TALK-CONF-2024-074]
17+3
28 May 2024
/ 16th Pisa Meeting on Advanced Detectors
Abstract: The SuperKEKB collider will undergo a major upgrade at the end of the decade to reach the target luminosity of 6 10^35 cm-2 s-1, offering the opportunity to install a new pixelated vertex detector (VTX) for the Belle II experiment. [...]
V1: PDF; V2: PDF; |
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4.
| $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
/ DPG
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. [...]
Fulltext: PDF; |
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5.
| 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. [...]
arXiv:2401.02840: PDF (additional files); |
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6.
| The Silicon Vertex Detector of the Belle II Experiment
/ Suryanarayan Mondal ; Belle II SVD Collaboration
[BELLE2-TALK-CONF-2023-150]
15' -> 12' for talk and 3' for discussion
25 September 2023
/ IPRD23 Siena
In June 2022 the data taking of the Belle II experiment was stopped for the Long Shutdown 1 (LS1), which is primarily required to install a new two-layer DEPFET detector (PXD) and upgrade components of the accelerator. [...]
Fulltext: PDF; |
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7.
| Hot topic from Belle and Belle II
/ Pavel Pakhlov
[BELLE2-TALK-CONF-2023-129]
20+5'
22 August 2023
/ 21st Lomonosov Conference on Elementary Particle Physics
We present selected new results from Belle and Belle II from many sectors..
Fulltext: PDF; |
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8.
| Recent results from Belle II
/ Valerio Bertacchi
[BELLE2-CONF-PROC-2023-008]
Proceedings of QCD22 conference
02 September 2022
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: PDF; |
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9.
| Dark-sector physics at Belle II
/ Ezio Torassa
[BELLE2-TALK-CONF-2023-029]
20 min + 5 min discussion
30 March 2023
/ Prospecting for New Physics through Flavor, Dark Matter, and Machine Learning
Review of the dark-sector physics at Belle II presented at the Aspen 2023 Winter Conference: "Prospecting for New Physics through Flavor, Dark Matter, and Machine Learning"
Fulltext: PDF; |
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10.
| $R(D^{*})$ measurement using the hadronic tag algorithm with $189~\mathrm{fb}^{-1}$ data at the Belle~II experiment
/ Kazuki Kojima ; Toru Iijima ; Qi-Dong Zhou ; Kodai Matsuoka ; et al
[BELLE2-NOTE-PH-2022-032] [BELLE2-TALK-DRAFT-2023-035]
[BELLE2-TALK-CONF-2023-024]
20 minutes (15 minutes presentation + 5 minutes Q&A); https://www.jps.or.jp/activities/meetings/past.php; https://kds.kek.jp/event/45609/
22 March 2023
/ The 2023 Spring 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 more than $3\sigma$. [...]
Slide in Japanese: PDF; |
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