CLAS physics database search results Measurement E159M1048 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 0.55305 0.175559 27 0.670351 0.167124 45 0.79819 0.204028 63 0.911464 0.204535 81 0.894426 0.214937 99 0.8659 0.173883 117 0.859178 0.17462 135 0.511083 0.188416 153 0.460065 0.322262 171 0.625628 0.516256