CLAS physics database search results Measurement E159M219 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 3.97343 0.713959 27 4.04283 0.636264 45 3.42997 0.521773 63 3.62007 0.550748 81 2.74593 0.424056 99 3.09668 0.475077 117 2.74467 0.426077 135 3.04452 0.478974 153 2.90429 0.471646 171 3.22929 0.583656