Constraints on the form factors forK→πlνand implications for|Vus|

2006/07/31 by Richard J. Hill · 42 citations
Physics and Astronomy · #Algorithm #Computer science #Nuclear physics research studies #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.74.096006

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 74(9) (American Physical Society) · 5 pages, 3 figures; references added, version to appear in Phys. Rev. D alongside hep-ex/0608058

openalex publication_date 2006/11/20 · arxiv created 2006/12/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Rigorous bounds are established for the expansion coefficients governing the shape of semileptonic K\ensuremath→\ensuremathπ form factors. The constraints enforced by experimental data from \ensuremathτ\ensuremath→K\ensuremathπ\ensuremathν eliminate uncertainties associated with model parametrizations in the determination of |V_us|. The results support the validity of a powerful expansion that can be applied to other semileptonic transitions.

Citations

• Improved bounds for the slope and curvature of form factors
• Bounds on the slope and the curvature of the scalar Kπ form factor at zero momentum transfer
• Constraints on Form Factors for Exclusive Semileptonic Heavy to Light Meson Decays