In the framework of chiral perturbation theory we study the one-loop amplitude for KL→π0γγ. We find that it is finite, consistently with the absence of the corresponding counterterms. Our prediction for the branching ratio (6.8·10−7) is below the present experimental upper bound.
KL→π0γγ decay in the chiral effective lagrangian / Cappiello, Luigi; D’Ambrosio, G.. - In: NUOVO CIMENTO. A. - ISSN 0369-3546. - 99:2(1988), pp. 155-161. [10.1007/BF02735243]
KL→π0γγ decay in the chiral effective lagrangian
CAPPIELLO, LUIGI;
1988
Abstract
In the framework of chiral perturbation theory we study the one-loop amplitude for KL→π0γγ. We find that it is finite, consistently with the absence of the corresponding counterterms. Our prediction for the branching ratio (6.8·10−7) is below the present experimental upper bound.File in questo prodotto:
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