CLAS physics database search results Measurement E151M944 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.35 294 0.3906 0.6868 0.0414 0.45 294 0.3842 0.6964 0.0411 0.55 282 0.8084 0.6631 0.0663 0.55 294 0.158 0.5368 0.0321 0.65 270 -0.3578 0.5458 0.0398 0.65 282 0.476 0.6429 0.0459 0.65 294 -0.3212 0.4222 0.0381 0.75 66 0.0762 0.6025 0.0305 0.75 78 0.2903 0.6019 0.0367 0.75 90 -0.1669 0.5528 0.0324 0.75 270 2.3544 2.3544 0.1747 0.75 282 0.6926 0.6216 0.0588 0.75 294 0.2302 0.5089 0.0344 0.85 54 0.146 0.6625 0.0318 0.85 66 -0.6423 0.3957 0.0557 0.85 78 -0.3373 0.427 0.0388 0.85 90 0.3415 0.5884 0.039 0.85 102 0.0893 0.5918 0.0307 0.85 306 -0.4557 0.5548 0.0448 0.95 42 0.3577 0.5664 0.0398 0.95 54 -0.4554 0.5104 0.0448 0.95 102 0.3576 0.592 0.0398