Summary of the Spin Discussion on Mar.24 and Apr.14, 1998
| x-independent uncertainties | |||
| beam polarization | absolute | 10% -> 5% | |
| relative | Goal: <1% | ||
| luminosity | absolute | 10% -> 5% | |
| relative | 10**-4 ? | ||
| x-dependent uncertainties | |||
| statistics | (for prompt photon) | 5% - 30% | (for sqrt(s)=200GeV, |
| pT 10 - 30GeV/c, 5GeV/c bin) | |||
| background subtraction | (for prompt photon) | <20% background | (for sqrt(s)=200GeV, |
| (* uncertainty of pi0 asym.) | pT 10 - 30GeV/c, 5GeV/c bin) | ||
| hadron & bremsstrahlung | ? | ||
| event selection | <1% | ||
| theoretical | annihilation process | <20% background | |
| (* uncertainty of quark pol.) | |||
| higher order correction, etc. | ? | ||
| quark polarization | 20% - 8% | (for x=0.04 - 0.25 in 15 bins) | |
| uncertainties in x estimation | |||
| momentum scale | Goal: 1% | ||
| pT vs x | >50% * slope of asymmetry | ||
| kT | ? | ||
| global analysis | ? |