CLAS physics database search results Measurement E151M557 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.35 78 -0.0689 0.642 0.0303 0.65 90 -0.2474 0.7035 0.0336 0.65 102 -0.2187 0.5977 0.0328 0.65 246 -0.8517 0.548 0.0601 0.65 258 -0.3434 0.6387 0.0366 0.65 270 1.093 0.5898 0.0733 0.75 78 -0.9944 0.574 0.0678 0.75 90 0.8865 0.7163 0.062 0.75 102 0.0476 0.5548 0.0301 0.75 114 -0.4836 0.6238 0.0421 0.75 234 -1.0171 0.4666 0.0691 0.75 246 0.0919 0.6112 0.0305 0.75 258 -0.5266 0.507 0.044 0.75 270 0.3466 0.6222 0.0367 0.75 282 -0.2637 0.6258 0.0341 0.85 66 -0.5467 0.64 0.0449 0.85 90 0.7758 0.6538 0.0561 0.85 102 0.2497 0.6226 0.0337 0.85 114 0.5608 0.6407 0.0456 0.85 126 0.4971 0.5721 0.0427 0.85 138 0.5919 0.7574 0.047 0.85 222 1.25 0.5967 0.0821 0.85 234 0.6994 0.6905 0.0522 0.85 246 -0.8994 0.3719 0.0627 0.85 258 -0.1657 0.5018 0.0317 0.85 270 -0.4651 0.4518 0.0413 0.85 282 -0.2179 0.4869 0.0328 0.85 294 -1.2527 0.4642 0.0823 0.95 114 -0.1279 0.5862 0.031 0.95 138 1.3322 0.6742 0.0868 0.95 234 -0.0404 0.5529 0.0301 0.95 246 0.0344 0.5776 0.0301 0.95 258 -0.25 0.5037 0.0337 0.95 270 -0.0179 0.4664 0.03 0.95 282 0.2872 0.4968 0.0348 0.95 294 -0.5913 0.3869 0.047