CLAS physics database search results Measurement E151M1920 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.35 90 0.679 0.719 0.0509 0.35 282 -0.8973 0.6284 0.0621 0.45 210 -0.6643 0.7269 0.0502 0.45 246 -0.0523 0.7523 0.0302 0.45 258 -0.2117 0.7261 0.0326 0.45 270 -0.1644 0.7038 0.0316 0.45 282 -1.3447 0.5618 0.0868 0.55 78 -0.963 0.6345 0.0656 0.55 126 -0.4441 0.7656 0.0403 0.55 138 0.0691 0.6643 0.0303 0.55 222 -0.2501 0.6784 0.0336 0.55 258 -1.1458 0.6189 0.0756 0.55 270 0.3506 0.6955 0.0368 0.55 282 0.9706 0.6349 0.066 0.65 78 -0.6217 0.663 0.0482 0.65 114 -0.5511 0.7491 0.0449 0.65 126 -0.1459 0.6014 0.0313 0.65 138 -0.8655 0.6774 0.0604 0.65 198 -1.3627 0.6057 0.0879 0.65 210 0.3251 0.6327 0.0359 0.65 222 0.1435 0.7509 0.0312 0.65 282 0.7606 0.6704 0.055 0.65 294 -0.8103 0.6682 0.0575 0.75 66 -0.3105 0.5742 0.0354 0.75 186 -1.075 0.7504 0.0717 0.75 198 0.62 0.6014 0.0481 0.75 210 -1.3069 0.5345 0.0847 0.75 222 -0.8234 0.5441 0.0582 0.75 234 1.045 0.6342 0.0701 0.75 258 0.1795 0.8742 0.0319 0.75 270 -0.8165 0.6048 0.0579 0.75 282 -0.2512 0.5637 0.0336 0.85 114 -0.3029 0.6045 0.0352 0.85 126 0.1323 0.5684 0.0311 0.85 138 1.0936 0.7168 0.0727 0.85 198 0.2633 0.6622 0.034 0.85 210 -0.3571 0.641 0.037 0.85 222 -0.3457 0.5846 0.0366 0.85 234 -1.0675 0.5585 0.0713 0.85 270 0.008 0.6786 0.03