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KTeV KL->pi⁰e e gamma plots

Updated April 28, 2008.

[KL->pi0eeg Results]

Plots in PRD 76, 052001 (2007).

• ktev_det799.eps, ktev_det799.pdf
  FIG. 1: Schematic of the KTeV detector.
  
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• 2pi0_mass.eps, 2pi0_mass.pdf
  FIG. 2: The K_L->pi⁰pi⁰_D invariant mass distribution for data (dots) and K_L->pi⁰pi⁰_D Monte Carlo (solid histogram).
  
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• fuse3x3_2pi0_3pi0.eps, fuse3x3_2pi0_3pi0.pdf
  FIG. 3: The photon shape variable shape Chi². The top plot shows the shape Chi² variable for K_L->pi⁰pi⁰_D with the dots representing the data and the solid histogram the Monte Carlo. In the bottom histogram the dots are the data after removing the K_L->pi⁰pi⁰_D events, while the solid histogram shows the K_L->pi⁰pi⁰pi⁰_D Monte Carlo. The dashed histogram represents the sum of the signal and background Monte Carlo samples.
  
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• pp0kin_vs_mggg.eps, pp0kin_vs_mggg.pdf
  FIG. 4: The pp0kine variable plotted versus the gamma gamma gamma invariant mass for a) K_L->pi⁰pi⁰_D Monte Carlo events. The dark line represents the cut indicated in the text.
  
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• mindist.eps, mindist.pdf
  FIG. 5: The minimum distance between the projection of the upstream electron track segment to the CsI calorimeter and any photon candidate. The dots represent the data and the solid histogram the sum of the background and signal Monte Carlo. The enhancement at low values of the minimum distance is the result of bremsstrahlung production.
  
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• meeggg_final.eps, meeggg_final.pdf
  FIG. 6: The e⁺e^-gamma gamma gamma invariant mass for the events passing all selection criteria. The dots represent the data, while the dashed histogram represent the sum of the signal and backgrond Monte Carlo. The background Monte Carlo is indicated by the shaded histogram.
  
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• dalitzvars.eps, dalitzvars.pdf
  FIG.7: The Dalitz variables used in the fit for a_V: a) m_e+_e-_gamma, b) Y and c) m_e+_e-. The dots are the data. The dashed histogram is the sum of the background and signal Monte Carlo, and the filled histogram is the background Monte Carlo.
  
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Send corrections to Taku Yamanaka.