CLAS physics database search results Measurement E151M1142 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.45 270 1.4991 1.0057 0.1136 0.45 282 0.0782 0.8659 0.0305 0.55 90 0.1206 0.8422 0.0313 0.55 102 -0.2652 0.7822 0.0357 0.65 102 -0.3708 0.7117 0.0404 0.65 114 -0.8579 0.6911 0.0695 0.65 198 1.4782 1.0818 0.1121 0.65 294 0.1421 0.7471 0.0317 0.75 78 0.408 0.8278 0.0423 0.75 126 -0.371 0.8581 0.0404 0.75 198 -0.1001 0.8655 0.0309 0.75 210 -0.2345 0.8565 0.0346 0.75 222 1.4213 0.9556 0.1081 0.75 234 0.9768 0.8426 0.0774 0.75 246 -0.5805 0.7339 0.052 0.85 66 2.0633 0.8768 0.1538 0.85 78 0.824 0.705 0.0673 0.85 90 -0.2848 0.702 0.0365 0.85 102 0.3022 0.7487 0.0373 0.85 186 0.0503 0.8282 0.0302 0.85 198 -0.1895 0.6264 0.033 0.85 210 0.5263 0.7384 0.0488 0.85 222 0.9108 0.743 0.073 0.85 234 -0.3934 0.6647 0.0416 0.85 246 1.9945 0.8828 0.1488 0.85 258 1.0993 0.8067 0.0858 0.95 114 -1.4036 0.5991 0.1069 0.95 174 0.111 0.8038 0.0311 0.95 186 0.1151 0.8 0.0312 0.95 198 1.0253 0.7474 0.0807 0.95 210 -0.2896 0.5925 0.0367 0.95 222 1.0151 0.6253 0.08 0.95 234 -0.0417 0.5655 0.0302 0.95 246 0.7181 0.6002 0.0605 0.95 258 0.5563 0.7724 0.0505 0.95 270 -0.4368 0.5659 0.0438