%0 Journal Article
%T Precise Determination of the Branching Ratio of the Neutral-Pion Dalitz Decay
%A Husek, T.
%A Goudzovski, E.
%A Icampf, K.
%J Physical Review Letters
%D 2019
%V 122
%N 2
%I Amer Physical Soc
%@ 0031-9007
%G English
%F Husek_etal2019
%O WOS:000456041800006
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3886), last updated on Sat, 02 Feb 2019 11:46:46 +0000
%X We provide a new value for the ratio R = Gamma(pi(0) -> e(+)e(-)gamma(gamma))/Gamma(pi(0) -> gamma gamma) = 11.978(6) x 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 pi(0)-transition-form-factor slope. The ratio R translates into the branching ratios of the two main pi(0) decay modes: B(pi(0) -> gamma gamma) = 98.8131(6)% and B(pi(0) -> e(+)e(-)gamma(gamma)) = 1.1836(6)%.
%R 10.1103/PhysRevLett.122.022003
%U http://arxiv.org/abs/1809.01153
%U https://doi.org/10.1103/PhysRevLett.122.022003
%P 022003-6pp