KTeV Ke3gamma Radiative Decay plots
Updated July 6, 2002.
[Ke3gamma Radiative Decay Results]
"New Measurement of the Radiative K_{e3} Branching Ratio and Photon Spectrum"

ktev_vus.eps
The KTeV Detector, as configured for collecting the data used in this analysis.


momenta_ep.eps
Data/MC comparisons of the total charged momenta ($P_{e\pi}$). The $\chi^2/\text{DOF}=95.5/72.$


momenta_g.eps
Data/MC comparisons of the photon energy in the laboratory frame at two different scales. The photon energy was required to be above 3 GeV to be included in the \kpeng\ sample. This cut is indicated by the vertical line in each plot. The $\chi^2/\text{DOF}=6.2/14$ for the first plot and $24.4/27$ for the second.


brcomp.eps
A comparison of our branching ratio measurement with other recent measurements and predictions.


gcdppqtfcd.eps
The $\sigma=1$ \mbox{($\chi^2\chi_\textrm{min}^2=1$)} and $\sigma=2$ \mbox{($\chi^2\chi_\textrm{min}^2=4$)} contours of the fit/interpolated $\chi^2$ surface as a function of $C$ and $D$. The dot shows the position of the minimum, while the cross shows the IBonly point. The region within the oblique rectangle is rotated and redisplayed in the inset. The new axes $C'$ and $D'$ are obtained from $C$ and $D$ after a rotation of $\theta=25.8^\circ$.


gcdppqtfch2.eps
Data/MC comparison of the acceptancecorrected $E_\gamma^*$ spectrum at the best $CD$ point. The $\chi^2/\text{DOF}=4.3/4$, where the 025~MeV bin has not been included in the comparison.

Send corrections to Taku Yamanaka