CLAS physics database search results Measurement E159M84 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.20705 0.477884 27 3.51642 0.566587 45 2.98661 0.469173 63 2.39156 0.381457 81 1.81224 0.287623 99 1.83572 0.29721 117 1.61028 0.261228 135 1.69909 0.28573 153 1.54207 0.268516 171 1.32824 0.320035