Measurement of |V_us| using hadronic tau decays from BaBar & Belle
Swagato Banerjee
TL;DR
This paper measures the |V_us| element of the CKM matrix using hadronic tau decays involving kaons, utilizing data from BaBar and Belle to improve understanding of quark mixing and the strange quark mass.
Contribution
It provides new measurements of tau decay branching fractions with kaons, enabling a more precise determination of |V_us| and the strange quark mass.
Findings
Branching fractions for tau decays with kaons measured.
|V_us| value derived from tau decay data.
Enhanced precision in quark mixing matrix elements.
Abstract
We report on measurements of branching fractions for several hadronic tau decays to final states with kaons, which can be used to determine the strange quark mass and the element |V_us| of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are obtained from data collected with the BaBar and Belle detectors at the PEP-II and KEKB asymmetric-energy e+e- colliders at SLAC and KEK, respectively, both operating at center-of-mass energies near the Y(4S) resonance.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research