Phys. Rev. Lett. 86, 761–764 (2001)Study of the KL0→π+π-γ Direct Emission VertexReceived 25 August 2000; published in the issue dated 29 January 2001 We have perfomed studies of the KL0→π+π-γ direct emission ( DE) and inner Bremsstrahlung ( IB) vertices, based on data collected by KTeV during the 1996 Fermilab fixed target run. We find a1/a2 = -0.737±0.034GeV2 for the DE form-factor parameter in the ρ-propagator parametrization, and report on fits of the form factor to linear and quadratic functions as well. We concurrently measure Γ(KL0→π+π-γ,Eγ*>20MeV)/Γ(KL0→π+π-) = (20.8±0.3)×10-3, and a KL0→π+π-γ DE/(DE+IB) branching ratio of 0.683±0.011. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.761
DOI:
10.1103/PhysRevLett.86.761
PACS:
13.25.Es, 11.30.Er, 12.39.Fe, 13.40.Hq
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