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1.
| Belle II Upgrade
/ C.Cecchi for the Belle II Collaboration
[BELLE2-TALK-CONF-2024-062]
22 May 2024
/ FPCP
A summary of the upgrade program of Belle II, particularly planned LS2 upgrades..
Fulltext:  PDF; |
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2.
| 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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3.
| Recent BelleII results on BSM physics
/ Roberta Volpe on behalf of the Belle II Collaboration
[BELLE2-CONF-PROC-2023-019]
proceedings of DIS2023: XXX International Workshop on Deep-Inelastic Scattering and Related Subjects, Michigan State University, USA, 27-31 March 2023
08 July 2023
We report on recent results obtained by the Belle II experiment related to searches for beyond the standard model physics. [...]
after Belle2 rev: PDF; this is the first version draft: PDF; |
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4.
| $R(D^{*})$ 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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5.
| Measurement of instrumental asymmetries of kaons and pions
/ The Belle II Collaboration
[BELLE2-NOTE-PL-2022-004]
23 November 2022
We measure instrumental asymmetries of kaons and pions using $D^0 \to K^-\pi^+$ and $D^- \to K^0_S\pi^-$ decays. [...]
Fulltext: PDF; |
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6.
| $R(D^{*})$ 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) ; https://www.jps.or.jp/english/meetings-and-awards/autumn/autumn-meeting-index.html ; https://kds.kek.jp/event/43097/
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: PDF; Slide in Japanese: PDF; |
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7.
| Study of photon energy bias using π0 → γγ decays from D∗+ → D0(→ K−π+π0)π+
/ The Belle II Collaboration
[BELLE2-NOTE-PL-2022-002]
30 March 2022
We reconstruct clean samples of π0 → γγ decays from the D∗+ → D0(→ K−π+π0)π+ decay chain in both data and simulation to study the bias in the reconstructed π0 mass. [...]
Fulltext: PDF; |
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8.
| Muon and electron identification efficiencies and hadron-lepton mis-identification rates at Belle II for Moriond 2022
/ Charged PID Group ; The Belle II Collaboration
[BELLE2-CONF-PH-2022-003]
09 March 2022
We present a collection of selected results on the performance of Belle II in the identification of electrons and muons. [...]
Fulltext: PDF; |
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9.
| Belle II experiment sensitivity to the LFV decay tau -> l + alpha
/ The Belle II Collaboration
[BELLE2-NOTE-PL-2021-011]
22 September 2021
We study the charged lepton flavor violating decay tau -> l alpha, where alpha is a non-standard invisible boson that leaves the Belle II detector undetected and l is either an electron or a muon [...]
Fulltext: PDF; |
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10.
| Belle II experiment sensitivity to the LFV decays tau -> l + alpha
/ The Belle II Collaboration
[BELLE2-NOTE-PL-2021-010]
22 September 2021
We study the charged lepton flavor violating decay tau -> l alpha, where alpha is a non-standard invisible boson that leaves the Belle II detector undetected and l is either an electron or a muon [...]
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