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

F. Gabbiani, G. Valencia

Research output: Contribution to journalArticleResearchpeer-review

Abstract

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
JournalPhysical Review D
Volume64
Issue number9
Publication statusPublished - 1 Nov 2001
Externally publishedYes

Cite this

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abstract = "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.",
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KL → π0γγ and the bound on the CP-conserving KL → π0e+e-. / Gabbiani, F.; Valencia, G.

In: Physical Review D, Vol. 64, No. 9, 094008, 01.11.2001.

Research output: Contribution to journalArticleResearchpeer-review

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N2 - 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.

AB - 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.

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JO - Physical Review D

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