Measurement of the Branching Fraction of the Decay KL→π+πe+e

KTeV Collaboration

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Abstract

We report the first branching fraction measurement of the decay KL→π+πe+e.With a sample of 46 candidates, and an expected background level of 9.4 events, the branching fraction is determined to be B(KL→π+πe+e) = [3.2±0.6(stat)±0.4(syst)]×10−7.This measurement was carried out as part of the Fermilab KTeV (E799-II) experiment and is in good agreement with the expectations from the mechanisms of direct emission and inner bremsstrahlung.

Original languageEnglish (US)
Pages (from-to)4123-4126
Number of pages4
JournalPhysical review letters
Volume80
Issue number19
DOIs
StatePublished - Jan 1 1998

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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