CLAS physics database search results Measurement E159M192 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 3.41088 0.618286 27 4.18713 0.658985 45 3.38392 0.515555 63 3.50605 0.529937 81 3.32741 0.50354 99 3.15756 0.485866 117 2.69821 0.416262 135 3.16127 0.499045 153 3.28777 0.542457 171 2.70463 0.501912