Takeshi K. Komatsubara (KEK-IPNS) on e949-2002 gamma

2002.June.17-19: slides in Analysis Meeting at TRIUMF

1. note on Apr 23
2. note on Apr 25

2002-Apr-18: Introduction to gamma-2002: see this page (mirror of an E949 Web page )

• K+ -> pigg decay spectrum was generated by PAW with the subroutine "wpigg", which calculates the matrix element of the decay with several assumptoins:
  • Phase Space ,
  • ChPT with Unitarity Correction, c-hat=1.8 , and
  • ChPT without Unitarity Correction, c-hat=1.6 .
    • pi+ momentum (Top Left), kinetic energy (Top Right),
      higher-energy photon energy (2nd Left), opening-angle cosine to the pi+ (2nd Right)
      Lower-energy photon energy (3rd Left), opening-angle cosine to the pi+ (3rd Right)
      Invariant mass of two photons (Bottom Left), Z-parameter used in ChPT (Bottom Right)
      
    • page 1: full spectrum
      page 2: pigg(1) region (pi+ momentum >215 MeV/c)
      page 3: pigg(2) region (100 < pi+ momentum < 180 MeV/c)
      
• K+ -> pigg decay spectrum exclusively to the pigg(1) region
  • Phase Space ,
  • ChPT with Unitarity Correction, c-hat=1.8 , and
  • ChPT without Unitarity Correction, c-hat=1.6 .