There are several different parameterizations for , and simulations. However, they include different mechanisms so give different yields at the kinematics of E99-117. Test runs have been done in August 2000, the result (, ratios and cross sections) have been compared to simulations and the best parameterization has been choosed for the simulation of E99-117. For details please refer to Appendix A.
With average beam current 15, polarization 80%, target polarization 40%, spectrometer momentum acceptance
and solid angle acceptance 4.9 msr with open collimater (or 3.9 msr with 6 msr collimator) , the rates have been estimated by whitlow's fit. and ratios have also been estimated and are shown in Table 5.