CLAS physics database search results Measurement E42M3 eg1b H.Avakian 2000 x A_UL^sin2phi Data errors Systematic errors dimensionless dimensionless dimensionless dimensionless 0.15 -0.061 0.027 0.005 0.21 -0.058 0.02 0.005 0.27 -0.024 0.018 0.006 0.33 -0.029 0.026 0.007 0.41 -0.019 0.029 0.008