CLAS physics database search results Measurement E44M3 eg1b H.Avakian 2000 x A_UL^sin2phi Data errors Systematic errors dimensionless dimensionless dimensionless dimensionless 0.15 -0.069 0.057 0.005 0.21 0.055 0.034 0.007 0.27 -0.028 0.033 0.006 0.33 0.027 0.045 0.007 0.41 0.031 0.062 0.008