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KTeV KL -> pi0 e e plots

Updated July 21, 2004.

[KL->pi0 e e Results]

Plots in Phys. Rev. Lett. 93, 021805 (2004)

"Search for the Rare Decay K_L-> pi⁰e⁺e^-"

• fig1_redone.eps, fig1_redone.pdf
  m_{gamma gamma} (charged vertex) vs. m_{ee gamma gamma} (neutral vertex) for the data after all cuts have been applied except for the phase space cuts. The regions appearing in the figure are discussed in the text, and signal events in the center box have not been plotted. Masses are in GeV/c².
  
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• fig2_redone.eps, fig2_redone.pdf
  |y_gamma| distributions for K_L-> pi⁰e⁺e^- MC and K_L-> e⁺e^-gamma gamma data and MC. K_L->e⁺e^-gamma gamma events come from inside the swath but outside the box. K_L->pi⁰e⁺e^- MC are from inside the box, and the normalization is arbitraray. theta_min is in radians.
  
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• fig3_redone.eps, fig3_redone.pdf
  m_{gamma gamma} vs. m_{ee gamma gamma} in GeV/c² for the data after all cuts have been applied. The box is open and one event appears within the signal ellipse, with a background of 0.99 +- 0.35 events.
  
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Plots in Phys. Rev. Let. 86, 397 (2001)

"Search for the Decay K_L -> pi⁰ e⁺e^-"

• mmd0.eps
  Fig.1. M_{gamma gamma} vs M_{ee gamma gamma} for the data after all selection criteria except the phase space fiducial cuts designed to suppress K_L->ee gamma gamma. The boxes shown are described in the text; events within the central boxes have not been plotted.
  
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• finalbox.eps
  As in Fig. 1, on an expanded scale around the signal region, for the data (dots) and signal simulation. The contours mark the 1 and 2 $\sigma$\ levels for the signal. All selection criteria have been applied.
  
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Send corrections to Taku Yamanaka