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Belle II Results On Hadronic B Decays: Measuring CKM Angles And Charmless Penguin Contributions.pdf

BELLE2-TALK-CONF-2022-076.pdf
Preview of Belle II Results on Hadronic B Decays: Measuring CKM Angles and Charmless Penguin Contributions
🔗 Source: docs.belle2.org
📊 Size: 2.12 MB
👤 Author: Justin Skorupa, on behalf of the Belle II collaboration
⬇️ Downloads: 25

Summary

The Belle II collaboration presented recent results on hadronic B decays at the ICHEP 2022 conference in Bologna, Italy (7 July 2022). The study focuses on two primary areas:

1. Measurement of CKM Angle γ: Using the decay B+ → D(K0π+)K+, researchers determined angle γ with a world-record luminosity of 4.7 × 10^34 cm^-2s^-1. This measurement, achieved through interference between b→c and b→u transitions, resulted in γ = (78.4 ± 11.4 (stat.) ± 0.5 (syst.) ± 1.0 (ext.)° with a combined uncertainty of 3.5°. The analysis involved joint data from Belle (711 fb^-1) and Belle II (128 fb^-1).

2. Charmless Hadronic B Decays: Belle II aims to access angle α in charmless hadronic B decays like B → ρρ, B → ππ, etc., which are sensitive to penguin pollution. Isospin sum rules enable precision testing of the Standard Model in these loop decays, with a target accuracy of 1%.

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Description

Belle II presents significant advancements in measuring the CKM angle γ through precise hadronic B decays, achieving a world-record interaction rate and providing new insights into B meson physics with their latest results. The measurement of γ in B+ → D(K0Sh+h−)K+ sets a more accurate value, thanks to innovative analysis techniques and external input from partner experiments.

Technical Information

  • File Format: PDF
  • File Size: 2.12 MB
  • Pages: 15
  • Language: EN
  • Author: Justin Skorupa, on behalf of the Belle II collaboration
  • Total Downloads: 25
  • Last Updated: 1 week ago

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