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- W2077079025 abstract "We present a new analysis of the rare decay KL→π0e+e− taking into account important experimental progress that has recently been achieved in measuring KL→π0γγ and KS→π0e+e−. This includes a brief review of the direct CP-violating component, a calculation of the indirect CP-violating contribution, which is now possible after the measurement of KS→π0e+e−, and a reanalysis of the CP-conserving part. The latter is shown to be negligible, based on experimental input from KL→π0γγ, a more general treatment of the form factor entering the dispersive contribution, and on a comparison with the CP-violating rate, which can now be estimated reliably. We predict B(KL→π0e+e−)=(3.2+1.2−0.8)×10−11 in the Standard Model, dominated by CP violation with a sizable contribution (∼40%) from the direct effect, largely through interference with the indirect one. Methods to deal with the severe backgrounds for KL→π0e+e− using Dalitz-plot analysis and time-dependent KL–KS interference are also briefly discussed." @default.
- W2077079025 created "2016-06-24" @default.
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- W2077079025 date "2003-11-01" @default.
- W2077079025 modified "2023-09-27" @default.
- W2077079025 title "Extracting short-distance physics from KL,S→π0e+e− decays" @default.
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- W2077079025 doi "https://doi.org/10.1016/j.nuclphysb.2003.09.010" @default.
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