CLAS physics database search results Measurement E151M605 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.45 282 0.4998 0.7631 0.0428 0.55 114 -0.9021 0.5999 0.0628 0.65 90 1.1685 0.8823 0.0775 0.65 102 -0.2222 0.6019 0.0329 0.65 114 -0.6142 0.6737 0.0481 0.65 246 -0.3209 0.6335 0.0359 0.65 258 -0.5941 0.5584 0.0471 0.75 90 0.8542 0.8238 0.0602 0.75 102 -0.3591 0.6908 0.0372 0.75 114 -0.9725 0.5808 0.0666 0.75 126 0.7035 0.7759 0.0525 0.75 246 0.5721 0.7545 0.0461 0.75 258 0.5608 0.636 0.0456 0.75 270 -0.081 0.6833 0.0304 0.85 114 0.7999 0.6351 0.0574 0.85 234 0.1531 0.6331 0.0314 0.85 246 0.1536 0.5541 0.0314 0.85 258 0.1593 0.6051 0.0315 0.85 270 -0.0002 0.6495 0.03 0.85 282 -0.6921 0.5769 0.0519 0.95 246 0.8528 0.6151 0.0602 0.95 258 0.7784 0.5672 0.0563 0.95 270 0.6552 0.6369 0.0501 0.95 282 -0.3168 0.4911 0.0357 0.95 294 -0.6107 0.5292 0.0479