CLAS physics database search results Measurement E159M75 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.28628 0.464867 27 3.16631 0.521498 45 2.99676 0.471906 63 2.16855 0.34521 81 1.98988 0.316042 99 1.50939 0.24552 117 1.56589 0.253583 135 1.66429 0.284442 153 1.53152 0.275863 171 0.771973 0.206716