The statistical error of the asymmetries are:

The statistical error of and can be obtained from:

where () is the number of scattered electrons when the beam polarization is parallel or antiparallel (perpendicular) to the target polarization. They can be estimated from the cross section of inclusive deep inelastic electron scattering, as shown in section 3.

The error of for each kinematics can be written as:

To minimize we need
.

Xiaochao Zheng 2001-06-09