| Title▼ | Belle II Number▼ | Tags | Submit date▼ | Downloads |
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Belle II XYZ results in the charm sectorPublic
This report reviews the recent XYZ results from Belle. It also introduces the Belle II status and prospects on XYZ study including the re-observation of the X(3872) and e+e- to psi-prime signal via ISR with the current available Belle II data |
BELLE2-TALK-CONF-2021-024 | - | 2021-04-12 |
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Experimental and theoretical status of and perspectives for XYZ states Public
Belle and Belle II results on exotic charmonium states are reviewed. |
BELLE2-TALK-CONF-2021-025 | - | 2021-04-12 |
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Measurement of the time-integrated mixing probability chi_d with a semileptonic double-tagging strategy and 34.6 fb^-1 of Belle II collision dataPublic
We present a first measurement of the time-integrated mixing probability chi_d using Belle II collision data corresponding to the integrated luminosity of 34.6 fb^-1. We reconstruct pairs of B mesons both decaying in semileptonic final states. Using a novel extraction methodology, we measure 0.192 +- 0.010 (stat.) +- 0.016 (syst.), which is compat… |
BELLE2-CONF-PH-2021-004 | - | 2021-04-06 |
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Latest results on beauty and charm decays at Belle IIPublic
Invited talk on Latest results on beauty and charm decays at Belle II |
BELLE2-TALK-CONF-2021-014 | - | 2021-03-29 |
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Latest results on the dark sector and tau physics at Belle IIPublic
Latest results on tau and dark sector at Belle II, invited talk |
BELLE2-TALK-CONF-2021-020 | - | 2021-03-27 |
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Muon and electron identification efficiencies and hadron-lepton mis-identification rates at Belle II for Moriond 2021Public
We present a collection of selected results on the performance of \belletwo in the identification of electrons and muons. This work is based on a combination of sub-detector likelihoods and is carried out using data collected at the \belletwo experiment from 2019 to mid-2020. These data correspond to a total integrated luminosity of $\int L~\mathr… |
BELLE2-CONF-PH-2021-002 | - | 2021-03-25 |
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Dark Sector searches at Belle IIPublic
Dark Sector searches at Belle II. |
BELLE2-TALK-CONF-2021-011 | - | 2021-03-24 |
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Dark Sector Physics at Belle IIPublic
The Belle II experiment at the asymmetric $e^+e^-$ collider, SuperKEKB, is a substantial upgrade of the Belle/KEKB experiment. Belle II aims to record 50 ab$^{-1}$ of data over the course of the project. During the first physics runs in 2018-2020, around 100 fb$^{-1}$ of data were collected. These early data include specifically-designed low-multi… |
BELLE2-TALK-CONF-2021-017 | - | 2021-03-22 |
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Approved Plots: Study of {\boldmath $B^{+} \to K^{+} \ell^{+} \ell^{-}$} at Belle IIPublic
We report a study of flavor-changing neutral current mediated decays $B^{+} \to K^{+} \ell^{+} \ell^{-}$, where $\ell$ is an electron or a muon. The analysis is performed using 62.8\,${\rm fb}^{-1}$ data recorded near the $\Upsilon(4S)$ resonance by the Belle II experiment. |
BELLE2-NOTE-PL-2021-005 | - | 2021-03-22 |
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Search for B+ => K+ nu nubarPublic
A search for the flavour-changing neutral current decay B+ → K+ ν ν is performed with an electron-positron collision data sample corresponding to 63fb−1 collected at the Υ(4S) resonance by the Belle II experiment. A novel measurement method is developed, which exploits topological properties of the decay that differ from both generic bottom-meson … |
BELLE2-TALK-CONF-2021-018 | - | 2021-03-20 |
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Precision measurements of Vcb, D0 lifetime and tau massPublic
Measurements of Vcb, D0 lifetime and tau mass at Belle II |
BELLE2-TALK-CONF-2021-019 | - | 2021-03-20 |
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Monte Carlo matching in the Belle II softwarePublic
The Belle II experiment is an upgrade to the Belle experiment, and is located at the SuperKEKB facility in KEK, Tsukuba, Japan. The Belle II software is completely new and is used for everything from triggering data, generation of Monte Carlo simulation, tracking, clustering, and for high-level analysis. One important feature is the matching betwe… |
BELLE2-TALK-CONF-2021-134 | - | 2021-03-18 |
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Particle identification with the Belle II calorimeter using machine learningPublic
The Belle II experiment, located at the asymmetric SuperKEKB e+e- collider in Tsukuba, Japan, performs studies of B-physics and searches for new physics at the luminosity frontier. The Belle II electromagnetic calorimeter is constructed from 8736 CsI(Tl) scintillator crystals. It is designed to measure the energy deposited by charged and neutral p… |
BELLE2-TALK-CONF-2022-021 | - | 2021-03-18 |
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Rediscovery of $B^0 \to \pi^0 \pi^0$ at Belle IIPublic
We report on the first reconstruction of the $B^{0} \to \pi^{0} \pi^{0}$ decay mode at Belle II. We use samples of 2019 and 2020 data corresponding to 62.8 \invfb of integrated luminosity. We find $14.0^{+6.8}_{-5.6}$ reconstructed events, corresponding to a statistical significance of 3.4 standard deviations and a Branching Ratio, $\mathcal{B}$, … |
BELLE2-CONF-PROC-2021-013 | - | 2021-03-18 |
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Observation of inclusive B→Xsγ decays in early Phase III data (untagged).Public
This note contains a spectrum of b→(s,d)γ candidates selected in early Phase III data overlaid with expectations for continuum events and background BB events. The plot also shows the difference between the observed number of events and the background expectations. |
BELLE2-NOTE-PL-2021-004 | - | 2021-03-18 |
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Hadronic B decays study using Belle II data sample of 62.8 fb−1Public
We report measurements related to hadronic $B$ decays to final states that contain charm mesons. The analyses are performed on an $62.8~\mathrm{fb}^{-1}$ data set collected by the Belle II experiment at a center-of-mass energy corresponding to the mass of the $\Upsilon(4S)$ resonance. The measurements reported are for the decay modes $B^-\to D^0 h… |
BELLE2-CONF-PROC-2021-012 | - | 2021-03-17 |
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Slow-pion Relative Tracking Efficiency Studies at Belle IIPublic
We study the slow-pion relative tracking efficiency by using B 0 → D ∗ π + and B 0 → D ∗ ρ + decay modes. Owing to its limited phase space, the pion from D ∗ decay is traditionally referred to the slow-pion due to a small mass difference between the D ∗ and D 0 . We report herein a measurement of the relative tracking efficiency in the low-momentu… |
BELLE2-CONF-PROC-2021-011 | - | 2021-03-17 |
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Study of B→D(∗)h decays using 62.8 fb−1 of Belle II dataPublic
We report measurements related to hadronic $B$ decays to final states that contain charm mesons. The analyses are performed on an $62.8~\mathrm{fb}^{-1}$ data set collected by the Belle II experiment at a center-of-mass energy corresponding to the mass of the $\Upsilon(4S)$ resonance. The measurements reported are for the decay modes $B^-\to D^0 h… |
BELLE2-CONF-PH-2021-008 | - | 2021-03-17 |
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Lepton Identification using Belle II Silicon-strip Vertex DetectorPublic
We improve the identification performance of low-momentum leptons, especially electrons, using the specific ionisation information from the silicon-strip vertex detector (SVD) of the Belle II experiment. |
BELLE2-CONF-PROC-2021-009 | - | 2021-03-16 |
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Particle Identification in Belle II Silicon Vertex DetectorPublic
We report a particle identification (PID) method developed for charged pions, kaons, and protons using specific ionization information in the silicon-strip vertex detector (SVD) of Belle II with $D^{*+}\to D^{0}[\to K^{-}\pi^{+}]\pi^{+}$ and $\Lambda\to p\pi^{-}$ decay samples. The study is based on $e^{+}e^{-}$ collision data recorded at the $\U… |
BELLE2-CONF-PROC-2021-008 | - | 2021-03-16 |
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