CLAS physics database search results Measurement E151M653 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.35 78 0.8486 0.8671 0.0599 0.35 282 0.5665 0.8519 0.0458 0.45 78 -0.1944 0.6873 0.0323 0.45 258 -0.266 0.7488 0.0341 0.45 270 -0.4557 0.7324 0.0409 0.55 78 1.1517 0.8973 0.0766 0.55 126 -0.6955 0.6558 0.0521 0.55 138 -0.264 0.7712 0.0341 0.55 150 -1.062 0.6887 0.0716 0.55 258 0.1266 0.7652 0.031 0.55 270 -0.9587 0.6155 0.0659 0.55 282 -0.5009 0.7255 0.0429 0.65 114 -1.006 0.6638 0.0685 0.65 126 -0.5099 0.7255 0.0433 0.65 210 0.2475 0.8292 0.0336 0.65 222 0.4555 0.8037 0.0409 0.75 66 -0.8747 0.7273 0.0613 0.75 78 0.7225 0.798 0.0534 0.75 138 0.1563 0.8494 0.0315 0.75 210 -0.2515 0.6656 0.0337 0.75 222 0.4771 0.6922 0.0419 0.75 234 -0.5466 0.6995 0.0449 0.75 258 -0.0008 0.8026 0.03 0.75 270 -0.3687 0.6676 0.0375 0.75 282 0.5383 0.6614 0.0445 0.85 114 -0.4617 0.6357 0.0412 0.85 126 -0.5343 0.6087 0.0444 0.85 138 -0.6307 0.7479 0.0489 0.85 198 1.1768 0.8345 0.078 0.85 210 -0.6469 0.6204 0.0497 0.85 222 0.2308 0.6493 0.0332 0.85 234 0.0883 0.7986 0.0305 0.85 270 0.9431 0.7627 0.065