CLAS physics database search results Measurement E151M748 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.55 282 4.2216 1.6221 0.3908 0.65 282 0.3393 1.6616 0.0434 0.75 90 1.8363 2.0719 0.1721 0.75 102 -4.543 1.4414 0.4204 0.75 270 -0.9256 1.6526 0.0905 0.75 282 0.7765 1.5744 0.0777 0.75 294 2.4234 1.8342 0.2257 0.85 270 -0.9905 1.7535 0.0962 0.85 282 6.1534 6.1534 0.5687 0.85 294 -1.0624 1.4481 0.1025 0.95 78 -8.9784 5.0145 0.8292 0.95 102 7.0438 6.043 0.6508 0.25 66 0.2212 0.4642 0.0333 0.65 270 0.1423 0.4505 0.0314 0.65 282 -0.1855 0.4162 0.0324 0.75 78 0.0259 0.4627 0.03 0.75 90 -0.4789 0.4269 0.0434 0.75 270 -0.0771 0.4213 0.0304 0.75 282 0.4242 0.4458 0.0409 0.85 78 0.479 0.5252 0.0435 0.85 90 -0.165 0.4397 0.0319 0.85 102 0.3025 0.5241 0.036 0.85 114 -0.1754 0.5585 0.0321 0.85 246 -0.1022 0.4785 0.0307 0.85 258 0.0315 0.5284 0.0301 0.85 282 -0.1106 0.4475 0.0309 0.95 270 0.0567 0.8334 0.0302