Measurement of the branching ratio of KLe+eγγ

A. Alavi-Harati et al. (The KTeV Collaboration)
Phys. Rev. D 64, 012003 – Published 30 May 2001
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Abstract

We report on a study of the decay KLe+eγγ carried out as a part of the KTeV/E799 experiment at Fermilab. The 1997 data yielded a sample of 1543 events, including an expected background of 56±8 events. An effective form factor was determined from the observed distribution of the e+e invariant mass. Using this form factor in the calculation of the detector acceptance, the branching ratio was measured to be B(KLe+eγγ,Eγ*>5MeV)=(5.84±0.15(stat)±0.32(syst))×107.

  • Received 23 October 2000

DOI:https://doi.org/10.1103/PhysRevD.64.012003

©2001 American Physical Society

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Vol. 64, Iss. 1 — 1 July 2001

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