| Title▼ | Belle II Number▼ | Tags | Submit date▼ | Downloads |
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Dark sector searches 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-multiplicity trigge… |
BELLE2-TALK-CONF-2021-037 | - | 2021-05-24 |
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The re-discovery of the decays for CP violation measurements at Belle IIPublic
sin2𝜙1 (sin2𝛽) is measured using the 𝐶𝑃-eigenstates induced by the 𝑏→𝑐 tree diagram and it is the most precise variable among the CKM angles. We have presented the result of the measurement using the 𝐵0→𝐽/𝜓𝐾0𝑆 decay collected from the early Belle II data. On the other hand, it can be measured also using the decays induced by 𝑏→𝑠 penguin diagram. I… |
BELLE2-TALK-CONF-2021-032 | - | 2021-05-24 |
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Beauty physics from Belle IIPublic
Beauty physics from Belle II |
BELLE2-TALK-CONF-2021-031 | - | 2021-05-24 |
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Tau physics prospects at Belle IIPublic
The Belle II experiment is a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric e+e− collider. The design luminosity of the machine is 8 × 1035 cm−2s−1 and the Belle II experiment aims to record 50 ab−1 of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has complete… |
BELLE2-TALK-CONF-2021-033 | - | 2021-05-24 |
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Charmless B decays at Belle IIPublic
Charmless 𝐵 decays provide a unique portion of the Belle II program. The expected large signal yields with moderate backgrounds associated with efficient reconstruction of neutral particles enable world-leading determination of the CKM phase 𝛼/𝜙2, a conclusive understanding of the so-called K-𝜋 CP puzzle, and further insight into the nature of loc… |
BELLE2-TALK-CONF-2021-034 | - | 2021-05-24 |
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Search for rare electroweak decay B+→K+νν in early Belle II datasetPublic
An analysis of the B+→K+νν decay mode using 63~fb−1 of Υ(4S) data collected during the 2019 and 2020ab run by the Belle II experiment is reported. A new inclusive tagging method is used to enhance sensitivity to this rare process. The method is validated with dedicated samples including 9.2 fb−1 of data taken off resonance. |
BELLE2-TALK-CONF-2021-036 | - | 2021-05-24 |
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Results and prospects of radiative and electroweak penguins at Belle IIPublic
In the recent years, several measurements of 𝐵-decays with flavor changing neutral currents, i.e. 𝑏→𝑠 transitions hint at deviations from the Standard Model (SM) predictions.These decays are forbidden at tree-level in the SM and can only proceed via suppressed loop level diagrams. Rare decays of 𝐵 mesons are an ideal probe to search for phenomena … |
BELLE2-TALK-CONF-2021-035 | - | 2021-05-24 |
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Quarkonium at Belle IIPublic
The Belle II experiment at the SuperKEKB energy-asymmetric 𝑒+𝑒− collider is an upgrade of the B factory facility at KEK in Tsukuba, Japan. The experiment began operation in 2019 and aims to record a factor of 50 times more data than its predecessor. Belle II is uniquely capable of studying the so-called "XYZ" particles: heavy exotic hadrons consis… |
BELLE2-TALK-CONF-2021-029 | - | 2021-05-17 |
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Charmless B decays at Belle IIPublic
Charmless 𝐵 decays provide a unique portion of the Belle II program. The expected large signal yields with moderate backgrounds associated with efficient reconstruction of neutral particles enable world-leading determination of the CKM phase 𝛼/𝜙2, a conclusive understanding of the so-called K-𝜋 CP puzzle, and further insight into the nature of loc… |
BELLE2-TALK-CONF-2021-030 | - | 2021-05-17 |
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SEARCH FOR B+ → K+νν DECAYS WITH AN INCLUSIVE TAGGING METHOD AT THE BELLE II EXPERIMENTPublic
This contribution illustrates a new search for the flavor-changing neutral-current decay B+ → K+νν performed by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. In this study, a sample corresponding to an integrated luminosity of 63 fb−1 collected at the Υ(4S) resonance and an additional sample of 9 fb−1 colle… |
BELLE2-CONF-PROC-2021-016 | - | 2021-05-12 |
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Recent measurements in the beauty, charm, and tau sectors at Belle IIPublic
The first \epem collisions at SuperKEKB took place in the early 2019, and since then more than 100\invfb of data have been collected by the Belle II detector. Although, for many measurements, the collected data is still not large enough to compete with previous measurements at Belle and BaBar, the improvements in the detector and analysis techniq… |
BELLE2-CONF-PROC-2021-015 | - | 2021-05-09 |
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Latest Belle II results on beauty and charm decaysPublic
We present the measurements, performed by the Belle II experiment, related to the B and D meson decays. These results are based on 63 fb^-1 and 9 fb^-1 of e+e- collision data recorded by the Belle II detector at a center-of-mass energy corresponding to the mass of the Y(4S) resonance and 60 MeV below the Y(4S) resonance. The results reassure that… |
BELLE2-CONF-PROC-2021-014 | - | 2021-05-08 |
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Belle II Highlights and ProspectsPublic
Belle II Highlights and Prospects |
BELLE2-TALK-CONF-2021-027 | - | 2021-04-20 |
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Recent world leading results
on charm, and exotic b decaysPublic
An overview will be given of the latest experimental results in charm physics, including mixing and CP-violation measurements, and in decays of beauty hadrons into exotic states, such as candidate tetraquark and pentaquark states. |
BELLE2-TALK-CONF-2021-021 | - | 2021-04-20 |
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Overview of recents results of Belle IIPublic
An overview of the recent results in charmonium and bottomonium spectroscopy at Belle II is given, focused on the man achievements with Phase 3 early data and perspectives with full 50 ab-1 integrated luminosity data in the future |
BELLE2-TALK-CONF-2021-026 | - | 2021-04-19 |
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Prospects of semitauonic measurements at Belle IIPublic
The study of lepton flavor universality violation (LFUV) in semitauonic 𝑏-hadron decays has become increasingly important in light of longstanding anomalies in their measured branching fractions, and the very large datasets anticipated from the LHC and Belle II. Belle II is a next-generation SuperB-Factory and successfully started its physics run … |
BELLE2-TALK-CONF-2021-028 | - | 2021-04-17 |
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Belle (II) XYZ results in the B sectorPublic
Belle and Belle II results on exotic charmonium states are reviewed. |
BELLE2-TALK-CONF-2021-063 | - | 2021-04-13 |
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Measurement of the branching fractions of B → η'K decays using 2019/2020 Belle II dataPublic
This note describes the rediscovery of B → η' K decays in Belle II data, both in the charged and neutral final state: B0 → η' KS and B± → η' K± . The η' is searched for in two decay modes: η' → ηπ+ π− with η → γγ, and η' → ργ. The analysis uses data collected in 2019 and 2020 at the SuperKEKB asymmetric e+ e− collider, with an integrated luminosit… |
BELLE2-CONF-PH-2021-007 | - | 2021-04-13 |
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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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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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