CLAS physics database search results Measurement E159M417 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 3.16633 0.562236 27 2.70329 0.39267 45 2.68075 0.414651 63 2.64225 0.389896 81 2.45628 0.352819 99 2.24332 0.340354 117 2.04114 0.294776 135 2.37388 0.368147 153 2.16883 0.336107 171 2.91386 0.517891