CLAS physics database search results Measurement E159M390 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.83363 0.499938 27 2.64535 0.425106 45 2.91248 0.419731 63 2.87858 0.415275 81 2.92471 0.411872 99 2.4847 0.349947 117 2.40889 0.356223 135 2.28756 0.346529 153 2.44878 0.375074 171 2.61088 0.479379