x-dependent uncertainties (contd.)
background subtraction (for prompt photon)
- reconstruction of p0 and h - 2-photon decay
- background - escape photon, 2-photon merge, other decays
- correction - asymmetry measurements of p0 and h
- hadron & bremsstrahlung
- full detector simulation necessary
- How much asymmetry remains after subtracting backgrounds considering their asymmetries ?
event selection ə%?
- trigger efficiency
- acceptance
- efficiency correction