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KTeV KL -> pi⁰pi⁰e⁺e^- plots

Updated September 6, 2002.

[KL->pi0 pi0 e e Results]

Plots in Accepted by Phys. Rev. Lett.

Search for the K_L->pi⁰pi⁰e⁺e^- Decay in the KTeV Experiment

• new_bgd_mc.eps4
  Fig.1. Monte Carlo simulation of backgrounds to K_L->pi⁰pi⁰e⁺e^- p_t² vs M_eegggg. The total number of background events in the plot is equivalent to three times the actual integrated flux of the KTeV data.
  
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• new_dat.eps4
  Fig.2. Events from the experimental data surviving all criteria for K_L->pi⁰pi⁰e⁺e^- decays vs p_t² and M_eegggg.
  
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• 2proj.eps
  Fig.3. Comparison of K_L->pi⁰pi⁰e⁺e^- data (dots) and Monte Carlo (histogram) background distributions for a) M_eegggg and b) p_t² distributions of events surviving cuts.
  
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• 3pi0d.eps
  Fig.4. The mass distribution of K_L->pi⁰pi⁰pi⁰_D in which the photon from the pi0 -> e⁺e^-gamma decays passes into one of beam holes in the CsI calorimeter and is reconstructed assuming that its trajectory passes through the center of the given beam hole. The solid dots are the data and the histogram is the Monte Carlo simulations of these events.
  
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Send corrections to Taku Yamanaka