CLAS physics database search results Measurement E151M773 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.65 90 -0.1523 0.483 0.0348 0.65 258 2.9678 1.1981 0.2755 0.75 102 -2.0367 1.2722 0.1904 0.75 114 1.6812 1.6454 0.158 0.75 258 -1.3904 1.0968 0.1318 0.75 270 -0.4193 1.0999 0.049 0.75 282 0.0134 1.2085 0.03 0.85 90 2.2895 1.7228 0.2134 0.85 102 2.4985 1.8355 0.2325 0.85 114 -0.1711 1.4979 0.0339 0.85 126 -1.3328 1.5683 0.1266 0.85 270 2.1616 1.314 0.2017 0.85 294 0.3178 1.1923 0.042 0.95 126 -5.8836 4.1126 0.5438 0.95 258 0.0027 3.8872 0.03 0.95 306 -2.5227 3.4292 0.2347 0.65 282 -0.0146 0.5094 0.03 0.75 78 1.0157 0.5345 0.0731 0.75 90 1.147 0.5688 0.081 0.75 102 0.0706 0.5272 0.0304 0.75 114 -0.92 0.5221 0.0674 0.75 246 -0.2995 0.5497 0.0359 0.75 270 0.4364 0.54 0.0415 0.75 282 0.3527 0.5624 0.0379 0.75 294 0.3266 0.5812 0.0369 0.85 78 0.9041 0.6019 0.0665 0.85 90 -0.0742 0.5857 0.0304 0.85 102 -0.6206 0.4598 0.0506 0.85 114 -0.5636 0.5475 0.0476 0.85 126 0.0375 0.6683 0.0301 0.85 234 1.0098 0.6433 0.0727 0.85 258 0.3154 0.6317 0.0364 0.85 270 -0.4019 0.5126 0.0399 0.85 282 -1.0524 0.4212 0.0753 0.85 294 -0.0154 0.6128 0.03 0.95 90 0.6307 0.9744 0.0511 0.95 102 1.1503 1.0187 0.0812 0.95 114 0.2573 1.0191 0.0344 0.95 258 -0.1447 0.9678 0.0315 0.95 270 0.9576 0.9702 0.0696 0.95 282 -0.8661 0.8276 0.0643 0.95 294 2.167 0.9758 0.1453 0.95 306 0.7114 0.8874 0.0555