CLAS physics database search results Measurement E39M91 E1-5st-Sigma0 (E93-030/E00-112) Mestayer, Hicks, Carman, Raue 1999 cos(theta) sigma Data errors nb/sr nb/sr -0.6 0 0 -0.25 3.1 1.58 0.05 5.86 2.2 0.35 9.57 2.51 0.65 18.54 6.72