CLAS physics database search results Measurement E151M2099 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 114 -0.89 0.6058 0.1092 0.65 102 -0.2421 0.8077 0.0339 0.65 114 -0.2398 0.8163 0.0338 0.65 138 0.8902 0.9758 0.0871 0.65 222 -0.844 0.848 0.0832 0.65 234 -0.4189 0.621 0.044 0.75 102 0.8598 0.8917 0.0635 0.75 114 0.7012 0.6555 0.0636 0.75 126 -0.8669 1.0147 0.0851 0.75 210 -0.8683 0.9616 0.064 0.75 222 0.0311 0.8018 0.0301 0.75 234 -0.7547 0.6175 0.065 0.85 90 -1.2064 1.0435 0.1149 0.85 222 0.1381 0.8873 0.0326 0.85 234 0.2418 0.9025 0.0373 0.85 246 -0.6813 0.9842 0.0694 0.95 234 -0.5931 2.5784 0.0622 0.95 246 2.8041 2.5409 0.2594 0.75 282 -1.6726 0.7409 0.1129 0.75 294 0.8352 0.795 0.0621 0.85 90 -0.2878 0.9573 0.0354 0.85 198 -0.4491 1.1409 0.0419 0.85 222 -1.9289 0.8078 0.129 0.85 234 -1.4407 0.876 0.0984 0.85 246 0.6798 0.9032 0.0534 0.95 246 0.635 1.4222 0.0511 0.95 258 1.6333 1.4725 0.1104