PrimEx Program at 12 GeV JLAB

1
PrimEx Program at 12 GeV JLAB

• We propose to measure
• Two-Photon Decay Widths G(??gt??), G(???gt??)
• Transition Form Factor F?? P of p0, ? and ?? at
  low Q2 (0.001--0.5 GeV2/c2)
• via the Primakoff effect.

2

• Fundamental input to physics
• Determination of quark mass ratio
• h-h mixing
• Interaction radius of p0, h and h
• Is the h an approximate Goldstone boson?