CLAS physics database search results Measurement E151M1841 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.35 78 -0.1366 0.8122 0.0311 0.35 282 0.2047 0.7292 0.0325 0.35 294 -0.9028 0.7036 0.0624 0.55 102 -0.9146 0.7807 0.063 0.65 102 1.8273 0.6383 0.1147 0.65 114 0.7219 0.7211 0.053 0.65 126 -1.2404 0.7534 0.0809 0.65 138 -0.6141 0.7594 0.0478 0.65 234 0.3074 0.768 0.0353 0.75 102 1.4251 0.5577 0.0914 0.75 114 0.8495 0.677 0.0596 0.75 210 -1.1163 0.7275 0.074 0.75 234 1.9533 0.5702 0.1221 0.75 246 0.4135 0.7062 0.0391 0.75 258 0.8258 0.7671 0.0583 0.85 66 -0.308 0.7715 0.0353 0.85 78 0.7263 0.6326 0.0533 0.85 114 0.2076 0.7454 0.0325 0.85 126 -0.7385 0.757 0.0539 0.85 234 0.5307 0.7388 0.044 0.85 246 -0.2067 0.509 0.0325 0.85 258 -0.116 0.6471 0.0308 0.85 270 0.7678 0.6228 0.0554 0.95 234 0.3993 0.6206 0.0385 0.95 246 -0.0464 0.7016 0.0301 0.95 258 1.0282 0.5399 0.0691 0.95 270 -0.0399 0.6191 0.0301 0.95 282 0.3622 0.5164 0.0372 0.95 294 0.1514 0.627 0.0314