KL→π0γγ and the bound on the CP-conserving KL→π0e+e-

F. Gabbiani, G. Valencia

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It has been known for many years that there is a CP-conserving component for the decay mode KL→π0e+e- and that its magnitude can be obtained from a measurement of the amplitudes in the KL→π0γγ decay mode. We point out that the usual description of the latter in terms of a single parameter av is not sufficient to extract the former in a model independent manner. We further show that there exist known physics contributions to KL→π0γγ that cannot be described in terms of the single parameter av. We Conclude that a model independent analysis requires the experimental extraction of three parameters.

Original languageEnglish
Article number094008
Pages (from-to)940081-940087
Number of pages7
JournalPhysical Review D
Issue number9
Publication statusPublished - 1 Nov 2001
Externally publishedYes

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