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Belle II status and prospects for studies of tau decaysPublic
We present here the status and prospects on tau decay studies at Belle II: direct searches for lepton flavor violation, high precision measurement of the tau lepton mass and prospects for lepton flavor universality tests are reported. |
BELLE2-TALK-CONF-2023-058 | Laura Zani |
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Determination of the Cabibbo-Koyabashi-Maskawa matrix elements |Vcb| and |Vub| at Belle and Belle II Public
A precise knowledge of the elements |𝑉𝑐𝑏| and |𝑉𝑢𝑏| of the CKM matrix is important to constraint the Standard Model of particle physics and predict the rate of ultra-rare 𝐵 meson decays such as 𝐵→𝜇𝜈 or 𝐵→𝐾𝜈𝜈¯. In this talk I will review the experimental status of these fundamental parameters with a focus on the latest developments and new results … |
BELLE2-TALK-CONF-2023-057 | Christoph Schwanda |
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Recent semileptonic results from Belle and Belle IIPublic
Summary of recent semileptonic results of Belle and Belle II for the Flavor@TH Workshop at CERN in May 2023. |
BELLE2-TALK-CONF-2023-056 | Florian Bernlochner |
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Flavor Physics with Belle and Belle IIPublic
Belle II is a high-energy physics experiment searching for new physics in a large number of B meson, D meson, and tau lepton decays produced in electron-positron collisions at the SuperKEKB accelerator at KEK laboratory in Japan. Belle II has reported a handful of world-leading or competitive results to date. Examples of the results include the le… |
BELLE2-TALK-CONF-2023-055 | Takeo Higuchi |
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Overview of flavor physics including LHCb with status and prospects of Belle IIPublic
Belle II is a flavor physics experiment at the asymmetric 𝑒+𝑒− collider SuperKEKB in Japan. Belle II aims to record an order of magnitude more data than the previous Belle experiment. Belle II started operation in 2019 and has accumulated 430 fb−1 of data to date. I will present the status and plans of the Belle II experiment, and review its recen… |
BELLE2-TALK-CONF-2023-032 | Shohei Nishida |
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Recent dark-sector results from Belle IIPublic
The Belle II experiment at the SuperKEKB collider has unique sensitivity to a broad class of models that postulate the existence of dark matter particles with MeV—GeV masses. This talk presents recent world-leading physics results from Belle II searches for long-lived scalar particles and Z’ decays; as well as the near-term prospects for other dar… |
BELLE2-TALK-CONF-2023-031 | Akimasa Ishikawa |
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Recent highlights from the Belle II experimentPublic
The Belle II experiment at the SuperKEKB collider has now collected approximately 400 million bottom-antibottom meson pairs at the Y(4S) resonance. We report a selection of recent results in bottom, charm and tau-lepton physics that probe non-standard-model dynamics and refine our understanding of the electroweak and strong interactions. |
BELLE2-TALK-CONF-2023-030 | Tristan Fillinger |
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Dark-sector physics at Belle IIPublic
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" |
BELLE2-TALK-CONF-2023-029 | Ezio Torassa |
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Recent quarkonium results at Belle IIPublic
Belle II offers unique possibilities for discovering and interpreting exotic multiquark bound states to probe the fundamentals of QCD. This talk presents recent results on a unique data set collected at energies above the Υ(4S), including searches for the hidden bottom transition between Y(10750) and χbJ. |
BELLE2-TALK-CONF-2023-028 | Alessandro Boschetti |
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Recent Belle II results related to flavor anomaliesPublic
Persistent anomalies reported by various experiments in $b \rightarrow c$ and $b \rightarrow s\ell\ell$ transitions hint at possible violation of lepton-flavor universality. The Belle II experiment at the SuperKEKB collider probes the relevant effects using observables complementary to those explored elsewhere. This talk reports recent results fro… |
BELLE2-TALK-CONF-2023-027 | Kazuki Kojima |
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Overview of Belle II upgradesPublic
An overview of the current and planned upgrades with emphasis on LS2. |
BELLE2-TALK-CONF-2023-026 | Peter Krizan |
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Belle II results related to b→c anomaliesPublic
Recent Belle II results of light-lepton flavor universality tests for b→c anomalies using semileptonic B decays are shown. This talk discusses the results of two measurements of $R(X_{e/\mu})$ and asymmetries of five angular observables between electron and muon, $\Delta\mathcal{A}_{x}(w)$, involving the hadronic tagging method in the Full Event I… |
BELLE2-TALK-CONF-2023-025 | Kazuki Kojima |
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$R(D^{*})$ measurement using the hadronic tag algorithm with $189~\mathrm{fb}^{-1}$ data at the Belle~II experimentPublic
In the semileptonic decay of 𝐵 mesons, the global average of $R(D^{*})$ measurement deviates from the Standard Model by more than $3\sigma$. It indicates a violation of the lepton universality. We will measure $R(D^{*})$ for the validation of this deviation using the Belle II data. We have developed an analysis method employing the hadronic tag al… |
BELLE2-TALK-CONF-2023-024 |
Qi-Dong Zhou,
Kodai Matsuoka,
Koji Hara,
Katsuro Nakamura,
Taichiro Koga,
Toru Iijima,
Kazuki Kojima
for the Belle II Collaboration |
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Particle identification at Belle II using Neural NetworksPublic
We will present improvements to the charged-particle identification algorithms used by the Belle II experiment located at KEK, Japan. So far, different approaches have been used to tackle the challenge of combining the information from each subdetector into a single variable for particle identification in an optimal way. We will present evaluation… |
BELLE2-TALK-CONF-2023-023 | Stefan Wallner, Daniel Greenwald, Stephan Paul, Xavier Simo |
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Recent Dark-Sector and tau  results from Belle IIPublic
The Belle II experiment at the SuperKEKB collider has unique sensitivity to a broad class of models that postulate the existence of dark matter particles with MeV—GeV masses. This talk presents recent world-leading physics results from Belle II searches for Z’ decays; as well as the near-term prospects for other dark-sector searches. In addition, … |
BELLE2-TALK-CONF-2023-022 | Sascha Dreyer |
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BSM Discovery Potential of Belle II in b->c and b-->sPublic
We describe the BSM discovery potential of Belle II@SuperKEKB in b->c and b->s processes. We review the Belle II prospects presented at Snowmass 2022 and then describe three pathways for discovery of new physics. These are (1) Angular correlations in B->D* l nu (2) Angular correlations in B->K* l+ l- and (3) B->K(*) nu nubar. |
BELLE2-TALK-CONF-2023-021 | Thomas Browder |
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Charmless 𝑩 Decay Measurements at Belle IIPublic
We report the measurements of $\CP$ asymmetry and branching fraction of various charmless $B$ decays performed using $\epem$ collision data recorded at the $\FourS$ resonance with the Belle II detector at the SuperKEKB collider. These include a test of the standard model using isospin sum rule, an investigation of localized $\CP$ asymmetries in th… |
BELLE2-CONF-PROC-2022-009 | Sagar Hazra |
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Bottomonium physics at Belle IIPublic
Bottomonium spectroscopy offers excellent opportunities for insights on the behavior of QCD in the non-perturbative regime. In order to guide theorists through the difficult task of modeling non-perturbative QCD phenomena, the experimental measurement of masses, widths, and transition rates of bb¯ states is crucial. Recent analyses of Belle and Be… |
BELLE2-TALK-CONF-2023-020 | Alessandro Boschetti |
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Recent results from Belle IIPublic
Highlights of recent results |
BELLE2-TALK-CONF-2023-019 | Giulia Casarosa |
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CKM first measurements at Belle IIPublic
CKM first measurements at Belle II |
BELLE2-TALK-CONF-2020-029 | Mario Merola |
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