Abstract
We provide a new value for the ratio R=Γ(π0→e+e-γ(γ))/Γ(π0→γγ)=11.978(6)×10-3, which is by 2 orders of magnitude more precise than the current Particle Data Group average. It is obtained using the complete set of the next-to-leading-order radiative corrections in the QED sector, and incorporates up-to-date values of the π0-transition-form-factor slope. The ratio R translates into the branching ratios of the two main π0 decay modes: ℬ(π0→γγ)=98.8131(6)% and ℬ(π0→e+e-γ(γ))=1.1836(6)%.
Original language | English |
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Article number | 022003 |
Journal | Physical Review Letters |
Volume | 122 |
Issue number | 2 |
DOIs | |
Publication status | Published - 18 Jan 2019 |
ASJC Scopus subject areas
- General Physics and Astronomy