Measurement of the Branching Fraction of the Decay KLπ+πe+e

J. Adams et al. (KTeV Collaboration)
Phys. Rev. Lett. 80, 4123 – Published 11 May 1998
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Abstract

We report the first branching fraction measurement of the decay KLπ+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(KLπ+πe+e)=[3.2±0.6(stat)±0.4(syst)]×107. 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.

  • Received 28 January 1998

DOI:https://doi.org/10.1103/PhysRevLett.80.4123

©1998 American Physical Society

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Vol. 80, Iss. 19 — 11 May 1998

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