CLAS physics database search results Measurement E159M147 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.1936 0.441787 27 3.34517 0.539112 45 3.67543 0.568326 63 3.67247 0.555231 81 3.6844 0.559522 99 2.98675 0.449742 117 2.85525 0.453395 135 2.93315 0.472354 153 3.30578 0.540114 171 2.79718 0.50892