CLAS physics database search results Measurement E159M462 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.0673 0.311942 27 0.946326 0.174594 45 0.796832 0.1385 63 0.624713 0.092431 81 0.659284 0.126784 99 0.735721 0.11848 117 0.621451 0.100947 135 0.839096 0.173536 153 0.817393 0.211153 171 0.572209 0.141032