CLAS physics database search results Measurement E159M759 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.22316 0.311461 27 1.27511 0.212795 45 1.32376 0.205047 63 1.14552 0.173726 81 1.01717 0.154339 99 1.22432 0.187205 117 1.23807 0.22232 135 1.23331 0.201985 153 0.968361 0.16386 171 1.0679 0.218776