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- W2224846588 abstract "We report on a new measurement of the decay KL→π0γγ by the KTeV experiment at Fermilab. We determine the KL→π0γγ branching ratio to be (1.68±0.07±0.08)×10−6. Our data show the first evidence for a low-mass γγ signal as predicted by recent O(p6) chiral perturbation calculations which include vector meson exchange contributions. From our data, we extract a value for the effective vector coupling aV=−0.72±0.05±0.06.Received 22 February 1999DOI:https://doi.org/10.1103/PhysRevLett.83.917©1999 American Physical Society" @default.
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- W2224846588 date "1999-08-02" @default.
- W2224846588 modified "2023-10-16" @default.
- W2224846588 title "Measurement of the Decay<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mi>L</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi /><mml:mo>→</mml:mo><mml:mi /><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=italic>π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant=italic>γ</mml:mi><mml:mi mathvariant=italic>γ</mml:mi></mml:math>" @default.
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