Measurements of the Decay KLe+eγ

E. Abouzaid et al.
Phys. Rev. Lett. 99, 051804 – Published 3 August 2007

Abstract

The E799-II (KTeV) experiment at Fermilab has collected 83 262 KLe+eγ(γ) events above a background of 79 events. We measure a decay width, normalized to the KLπ0π0πD0 (π0γγ, π0γγ, πD0e+eγ(γ)) decay width, of Γ(KLe+eγ(γ))/Γ(KLπ0π0πD0)=(1.3302±0.0046stat±0.0102syst)×103. We also measure parameters of two KLγ*γ form factor models. In the Bergström-Massó-Singer parametrization, we find CαK*=0.517±0.030stat±0.022syst. We separately fit for the first parameter of the D’Ambrosio-Isidori-Portolés model and find αDIP=1.729±0.043stat±0.028syst.

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  • Received 23 February 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.051804

©2007 American Physical Society

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Vol. 99, Iss. 5 — 3 August 2007

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