CLAS physics database search results Measurement E159M111 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 3.18699 0.613026 27 4.86291 0.77718 45 4.77058 0.731186 63 4.38287 0.664243 81 3.40783 0.51383 99 3.18757 0.48312 117 3.21534 0.494212 135 3.55741 0.548527 153 3.68332 0.586524 171 2.38835 0.454559