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PUBDB-2025-01025

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurements of $|V_{cb}|$ and $|V_{ub}|$ from Belle and Belle II

Cao, L.Extern*DESY* ; Belle Collaboration (Collaboration author)DESY* ; Belle II Collaboration (Collaboration author)DESY*

2024

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Report No.: arXiv:2311.00375

Abstract: 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 $B^{0} \to \pi^{-} \ell^{+} \nu$ utilizing $189 \, \mathrm{fb}^{-1}$ data collected at the $\Upsilon(4S)$ resonance. This reveals the derived branching fractions and $|V_{xb}|$. The shape measurement of $B \to D^{*} \ell \nu$ at Belle extracted $|V_{cb}|$ employing new lattice-QCD calculations as input and provided additional tests on the universality of light lepton flavors. In the realm of inclusive decay, the measurement for $|V_{ub}|$ and the differential spectra of $B \to X_{u} \ell \nu$ decays have been performed. This presentation also encapsulates the new analyses of $|V_{ub}|^{\mathrm{excl}}/|V_{ub}|^{\mathrm{incl}}$ and $|V_{ub}|^{\mathrm{incl}}/|V_{cb}|^{\mathrm{incl}}$ ratios.

Keyword(s): electron positron: annihilation ; electron positron: colliding beams ; B0: semileptonic decay ; lepton: flavor ; BELLE ; KEK-B ; CKM matrix ; lepton: universality ; Upsilon(10570): electroproduction ; B0: branching ratio: measured ; lattice field theory ; experimental results

Note: 6 pages, proceedings for Beauty 2023

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Contributing Institute(s):

1. BELLE II Experiment (BELLE)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. KEK: BELLE I/II

Appears in the scientific report 2024

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Database coverage:
Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article/Contribution to a conference proceedings/Contribution to a book Cao, L. (Corresponding author)Extern*DESY* ; Belle Collaboration (Collaboration author)DESY* ; Belle-II Collaboration (Collaboration author)DESY*
Measurements of $|V_{cb}|$ and $|V_{ub}|$ from Belle and Belle II
202320th International Conference on B-Physics at Frontier Machines, BEAUTY 2023, Clermont-FerrandClermont-Ferrand, France, 7 Jul 2023 - 7 Jul 20232023-07-072023-07-07 Proceedings of Science / International School for Advanced Studies (Beauty2023), 044 (2023) [10.22323/1.443.0044]2023     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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