The pion beta and radiative electronic decays
Dinko Počanić
SciPost Phys. Proc. 5, 024 (2021) · published 6 September 2021
- doi: 10.21468/SciPostPhysProc.5.024
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Review of Particle Physics at PSI
Abstract
As the lightest meson, pion offers unique opportunities for measuring parameters and testing limits of the Standard Model (SM). The PiBeta experiment, carried out at PSI, focused on SM tests accessible through the pion beta, π + → π 0 e + ν e (γ), and electronic radiative, π + → e + ν e γ, decay channels. We review the PiBeta experiment, and update the pion beta decay branching ratio B πβ^exp = 1.038(6) tot × 10 −8 , along with the corresponding derived value of the Cabibbo-Kobayashi-Maskawa matrix element V ud = 0.9738(28).
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Funders for the research work leading to this publication
- National Science Foundation [NSF]
- Paul Scherrer Institut (through Organization: Paul Scherrer Institute [PSI])
- Российский фонд фундаментальных исследований / Russian Foundation for Basic Research [RFBR]