CLAS physics database search results Measurement E1M23 E93-006 CLAS experiment V. D. Burkert, M. Ripani 2003 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error deg mcbn/rad mcbn/rad 9 1.9499958 0.49298733 27 3.2018485 1.8865844 45 2.8496542 0.58894384 63 3.0888724 0.94566 81 3.4161847 1.0548723 98.99999 4.8180232 2.4165537 117 3.1644044 0.68788111 135 3.2217274 1.1365331 153 2.0979698 0.79742682 171 3.7926495 0