CLAS physics database search results Measurement E5M1 EG2000 CLAS H. Avakian 2000 x A_LU Data errors dimensionless dimensionless dimensionless 0.326 0.074 0.013 0.374 0.077 0.012 0.423 0.083 0.015 0.471 0.057 0.021 0.515 0.062 0.043