CLAS physics database search results Measurement E159M364 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 2.18776 0.371056 27 3.23528 0.514986 45 2.96731 0.441691 63 2.6345 0.364502 81 2.80577 0.384043 99 2.82696 0.379919 117 3.0741 0.438997 135 2.30259 0.486184 153 1.59748 0.986181 171 1.91978 1.22742