[KTeV HOME] [Results] [Publications] [Theses] [Talks]

KTeV KL -> pi0 nu nu-bar plots

Updated July 10, 2002.

[KL->pi0 nu nu-bar Results]

Plots from [PRD61 (2000)] [PLB 447 (1999)]

[top] PRD61 (2000) [PLB447 (1999)]

Plots in Phys. Rev. D 61, 072006 (2000)

"Search for the Decay K_L -> pi⁰nu nu-bar Using pi⁰-> e⁺e^- gamma"

• fig1.eps
  The KTeV detector configuration for E799-II.
  
  -------------------------------------------------------
• fig2.eps
  The P_T vs $z$ before the P_T cut. The location of the vacuum window is $z$ = 159~m.
  
  -------------------------------------------------------
• fig3.eps
  The final P_T distribution. The dots represent data, and open histogram is for MC expectation. Two main background contributions are overlaid. Also shown is the signal distribution predicted from the MC whose normalization is arbitrary.
  
  -------------------------------------------------------
• fig4.eps
  The number of events around masked region. The left(bold) numbers represent data and the right(italic) is MC expectation.
  
  -------------------------------------------------------

[top] [PRD61 (2000)] PLB447 (1999)

Plots in Phys. Lett. B 447, 240 (1999)

"Search for the Decay K_L-> pi⁰ nu nu-bar"

• ktev_det.eps
  Plan view of the KTeV detector as configured for this data set.
  
  -------------------------------------------------------
• pt_zvtx_new.eps
  The top plot is the P_T distribution of the $\pi^0$ from a Monte Carlo simulation of the decay $K_L -> \pi^0 \nu \overline{\nu}$. The bottom is the scatter plot of P_T $\rm (MeV/c)$ versus the z decay vertex (m) for data after the initial event selection which requires exactly two photons in the final state. The box shows the signal region.
  
  -------------------------------------------------------
• pt_final.eps
  The P_T distribution with all cuts except for the P_T cut. The arrow shows the signal region. The dominant backgrounds from simulations of $K_L$ and $\Lambda$ decays are overlaid on the data. $\Lambda$ events from the target and from $\Xi$ decays are combined. There are no events beyond the P_T range in the plot.
  
  -------------------------------------------------------

Send corrections to Taku Yamanaka