Publication Date

1995

Journal or Book Title

PHYSICAL REVIEW D

Abstract

The decay KL→π0e+e- is searched for as a signal of direct ΔS=1 CP violation. We provide a thorough updating of the analysis of the three components of the decay: (1) direct CP violation, (2) CP violation through the mass matrix, and (3) CP-conserving (two photon) contributions. First the chiral calculation of the KS→π0e+e- rate, due to Ecker, Pich and, de Rafael, is updated to include recent results on the nonleptonic amplitude. Then we systematically explore the uncertainties in this method. These appear to be so large that they will obscure direct CP violation unless it is possible to measure the KS→π0e+e- rate. The CP-conserving amplitude remains somewhat uncertain, but present indications are such that there may be a sizable CP-violating asymmetry in the e+,e- energies from the interference of the CP-conserving and CP-violating amplitudes and this may potentially be useful in determining whether direct CP violation is present.

Comments

This is the pre-published version which is collected from arXiv. The published version is at http://prd.aps.org/abstract/PRD/v51/i5/p2187_1

Volume

51

Pages

2187-2200

Issue

5

Included in

Physics Commons

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