CLAS physics database search results Measurement E151M209 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.45 282 -0.378 0.2577 0.0475 0.55 270 -0.4875 0.4761 0.042 0.55 282 0.7713 0.615 0.0553 0.55 294 1.4293 0.7849 0.0911 0.65 270 0.35 0.6552 0.0367 0.65 282 -0.1643 0.4571 0.0316 0.75 270 -0.2632 0.5444 0.0339 0.75 282 0.8408 0.7181 0.0589 0.85 126 -0.3093 0.5433 0.0353 0.85 138 -0.1368 0.6202 0.0311 0.85 282 0.0765 0.6335 0.0304 0.95 102 0.3156 0.6297 0.0355 0.95 114 0.3237 0.6313 0.0358 0.95 126 -0.1232 0.5316 0.0309 0.95 138 0.6383 0.7247 0.0488 0.95 150 -0.0214 0.5367 0.03 0.95 162 -0.4887 0.4339 0.042 0.95 174 0.5462 0.7162 0.0445 0.95 186 -0.4266 0.4787 0.0395 0.95 198 2.1761 2.1761 0.1344 0.95 210 0.0468 0.5802 0.0301 0.45 294 0.0454 0.4597 0.0301 0.55 270 -0.51 0.3489 0.0436 0.55 282 0.5911 0.3374 0.0473 0.55 294 -0.5038 0.386 0.0433 0.65 270 0.1267 0.3767 0.031 0.65 282 0.6023 0.4162 0.0479 0.75 270 0.2206 0.3311 0.033 0.75 282 0.4765 0.4129 0.0421 0.95 102 0.3429 0.4162 0.0368 0.95 114 0.1397 0.3985 0.0312 0.95 138 -0.1083 0.369 0.0307 0.95 174 0.127 0.3954 0.031 0.95 186 -0.8636 0.3171 0.0613 0.95 210 0.3485 0.3446 0.037 0.95 222 -0.4048 0.3635 0.0391