| Title▼ | Belle II Number▼ | Tags | Date▼ | Downloads |
|---|---|---|---|---|
|
Recent quarkonium results from Belle IIPublic
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. The designed instantaneous luminosity of the machine is $6 \times 10^{35} \rm cm^{-2}s^{-1}$. The Belle II experiment aims to ultimately accumulate 50 ab$^{-1}$ of data, 50 times more than… |
BELLE2-CONF-PROC-2024-002 | - |
|
|
|
Study of 𝐵 → X𝑐 Λ0 𝐾/𝐾𝑠 with recoil mass approachPublic
In this study we search for decays $B^0\rightarrow X_c^- \Lambda^0 K^+$ and $B^0\rightarrow \overline{X}_c^0 \Lambda^0 K_s^0$ in Belle, where $X_c$ represents a charm baryon. Belle collected data at a center of mass energy close to $\Upsilon(4S)$ resonance, which decays only to two B mesons almost every time. We follow a recoil approach where th… |
BELLE2-CONF-PROC-2024-001 | - |
|
|
|
Rare decays at Belle and Belle IIPublic
We present the recent results of the rare decays from the Belle and Belle II experiments, collected at the Y(4S) resonance. The data sample from Belle is 711/fb, and 189/fb or 361/fb data sample from Belle II. Here, we report five rare decays involving b→s (d) transitions. The measurement of branching fractions for B→K*ll decays using 189/fb data … |
BELLE2-CONF-PROC-2023-050 | - |
|
|
|
Lepton universality tests and searches for new physics in charged current decays at Belle IIPublic
We present recent tests of lepton universality as crucial probes of the Standard Model in semileptonic $B$-meson decays at Belle II. All presented analyses use a data sample collected at the $\Upsilon(4S)$ resonance by the Belle II experiment corresponding to an integrated luminosity of $189\,\mathrm{fb}^{-1}$. We report three analyses that probe … |
BELLE2-CONF-PROC-2023-049 | - |
|
|
|
Measurement of time integrated raw asymmetry in D^{0}\longrightarrow K^{0}_{s}K^{0}_{s}}$ decay at Belle IIPublic
$D^{0}\longrightarrow K^{0}_{s}K^{0}_{s}$ is a Singly Cabibbo Suppressed decay, which involves the interference of $c\overline{u}\longrightarrow s\overline{s}$ and $c\overline{u}\longrightarrow d\overline{d}$ transitions. Due to such interference, the Charge Parity asymmetry may be enhanced to an observable level within the Standard Model. In this… |
BELLE2-CONF-PROC-2023-048 | - |
|
|
|
Time-integrated WS-to-RS ratio of the 𝑫0 −→ 𝑲+𝝅−𝝅0 decay at Belle IIPublic
In the standard model, mixing and CP violation in the charm sector are expected to be very small, and thus, they constitute a sensitive probe for potential new physics contributions. The “wrong-sign” 𝐷0 −→ 𝐾+𝜋−𝜋0 decay is one of the most promising channels at Belle II, as this can be produced through two interfering processes: a direct doubly Cabi… |
BELLE2-CONF-PROC-2023-047 | - |
|
|
|
Towards First Physics at Belle IIPublic
The next-generation B-factory Belle II at the upgraded KEKB accelerator, SuperKEKB, is aiming to start physics data taking in 2018. The broad physics program covers e.g. physics with B and D mesons, muon and tau leptons as well as measurements using the method of radiative returns and direct searches for New Physics. Among these analyses, there is… |
BELLE2-CONF-PROC-2016-001 | - |
|
|
|
The Belle II ExperimentPublic
The Belle II experiment is an upgrade to the Belle experiment, with a projected luminosity forty times that of its predecessor, allowing for precision measurements and the potential for new physics discoveries in the flavor sector. This document describes some of the physics that will be explored at Belle II, together with details of the construct… |
BELLE2-CONF-PROC-2015-003 | - |
|
|
|
Particle identification devices at the Belle II experimentPublic
Particle identification at the Belle II experiment at the SuperKEKB collider in Tsukuba, Japan, is provided by two ring imaging Cherenkov devices, the time of propagation counter in the barrel and the proximity focusing RICH with aerogel radiator in the forward end-cap region. They are expected to provide kaon identification efficiency of more tha… |
BELLE2-CONF-PROC-2015-002 | - |
|
|
|
The Study of Radiative $D_s$ DecaysPublic
The study of weak radiative decays of charmed mesons is still in its developing stage. In the Standard Model (SM), the physics of charm meson is not generally expected to have new physics (NP) discovery potential. The weak decays of $D$ mesons are also difficult to investigate due to the strong final state interactions. It has been pointed out tha… |
BELLE2-CONF-PROC-2023-046 | - |
|
|
|
The Silicon Vertex Detector of the Belle II ExperimentPublic
The Belle II experiment operating on the asymmetric e+ e- SuperKEKB collider, located in Tsukuba (Japan), has been collecting data since March 2019. Its excellent vertexing abilities are provided by Vertex Detector (VXD), part of which is Silicon Vertex Detector (SVD) playing a crucial role in the tracking close to the interaction point. SVD opera… |
BELLE2-CONF-PROC-2023-045 | - |
|
|
|
Heavy Quarkonia and Multiquarks at B-factoriesPublic
This review will cover the most recent results from the B factories in the field of heavy quarkonia and multiquark systems. At Belle-II, the first data taking period beyond the $\Upsilon(4S)$ peak energy has been been devoted to the study of the region around $\sqrt{s}=10.75$ GeV, where enhanced transition rates to lower bottomonia suggested the e… |
BELLE2-CONF-PROC-2023-037 | - |
|
|
|
Recent Belle II results on time-dependent CP violation and charm physicsPublic
Measurements of time dependent CP violation are chief goals of the Belle II physics program. Comparisons of penguin-dominated $b\to sq\bar{q}$ to tree-dominated $b\to sc\bar{c}$ results allow for stringent tests of CKM unitarity that are sensitive to non-SM physics, but require excellent vertexing capabilities. After presenting recent world-leadi… |
BELLE2-CONF-PROC-2023-036 | - |
|
|
|
Machine Learning for New Physics Searches in B → K∗0 µ+µ− DecaysPublic
We report the status of a neural network regression model trained to extract new physics (NP) parameters in Monte Carlo (MC) simulation data. We utilize a new EvtGen NP MC generator to generate B → K∗0 µ+µ− events according to the deviation of the Wilson Coefficient C9 from its SM value, δC9 . We train a three-dimensional ResNet regression model, … |
BELLE2-CONF-PROC-2023-035 | - |
|
|
|
Recent time-dependent measurements of 𝑪𝑷 violation at Belle IIPublic
We report on new time-dependent \CP violation measurements using the full dataset of \belletwo collected between 2019-2022 and on improved analysis software. Hadronic penguin decays, which proceed via a $b \to \qqbar s$ transition, are loop dominated, and thus sensitive to new physics. in this class, we measure the time-dependent \CP violation pa… |
BELLE2-CONF-PROC-2023-044 | - |
|
|
|
The Silicon Vertex Detector of the Belle II experimentPublic
The Belle II experiment located at KEK, Japan takes data from asymmetric e+e- collision provided by the SuperKEKB accelerator. The Silicon Vertex Detector (SVD), which is part of the Belle II Vertex Detector (VXD), has been operating smoothly and reliably since the start of data taking from March 2019. In this article, we report on the perfor… |
BELLE2-CONF-PROC-2023-043 | - |
|
|
|
Measurements of $|V_{cb}|$ and $|V_{ub}|$ from Belle and Belle~IIPublic
This proceeding summarizes recent measurements of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements $|V_{cb}|$ and $|V_{ub}|$ at the Belle and Belle~II experiments. It provides insights derived from both exclusive and inclusive determinations. Preliminary results from Belle~II are discussed, focusing on $B^0\to D^{*-}\ell^+ \nu$ and $B^{0} \to \… |
BELLE2-CONF-PROC-2023-042 | - |
|
|
|
Recent Belle II results on the CKM parameters $|V_{cb}|$ and $|V_{ub}|$Public
In this talk, the latest measurements of $|V_{ub}|$ and $|V_{cb}|$ by the Belle II collaboration are presented. These results are based on 189 fb$^{-1}$ of Belle II data recorded at the $\Upsilon(4S)$ resonance. We report measurements with inclusive and exclusive $B$ decays. Two main strategies are employed for these results, one where the other … |
BELLE2-CONF-PROC-2023-041 | - |
|
|
|
Recent Belle II results on hadronic B decaysPublic
We present recent measurements of hadronic $B$ meson decays produced in electron-positron collisions at the $\Upsilon(4S)$ resonance collected between 2019 and 2022 with the Belle II detector. We show measurements of $B\to D^{(*)}KK_{S}^0$ decays including the first observation of three modes. Furthermore, we report on new results to determine the… |
BELLE2-CONF-PROC-2023-040 | - |
|
|
|
Measurement of the Time-integrated WS-to-RS ratio of the ”Wrong-Sign” D0 −→ K+π−π0 decay at Belle IIPublic
In the standard model, mixing and CP violation in the charm sector are ex-9 pected to be very small and thus they constitute a sensitive probe for potential new physics contributions. The “wrong-sign” D0 → K+π−π0 decay is one of the most promising channels at Belle II, as this can be produced through two interfering processes: a direct doubly Cabi… |
BELLE2-CONF-PROC-2023-034 | - |
|