Study of the KL0π+πγ Direct Emission Vertex

A. Alavi-Harati et al. (KTeV Collaboration)
Phys. Rev. Lett. 86, 761 – Published 29 January 2001
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Abstract

We have perfomed studies of the KL0π+πγ 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(KL0π+πγ,Eγ*>20MeV)/Γ(KL0π+π)=(20.8±0.3)×103, and a KL0π+πγ DE/(DE+IB) branching ratio of 0.683±0.011.

  • Received 25 August 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.761

©2001 American Physical Society

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Vol. 86, Iss. 5 — 29 January 2001

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