CLAS physics database search results Measurement E151M2328 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 90 -0.8619 1.0143 0.0693 0.65 102 -0.2078 1.0488 0.0336 0.65 114 -1.9812 0.8571 0.1468 0.75 234 0.8669 0.9081 0.0697 0.75 258 1.8984 0.8856 0.1409 0.85 66 -0.282 1.0259 0.0363 0.85 78 2.3808 0.9468 0.1752 0.85 222 0.0197 0.9571 0.03 0.85 234 2.0658 0.7726 0.1528 0.85 246 -0.297 0.784 0.0369 0.85 258 1.2516 0.7981 0.0956 0.85 270 -1.1697 0.8991 0.09 0.85 282 -1.12 0.9476 0.0866 0.95 234 0.6271 0.804 0.0545 0.95 246 -0.2553 0.8835 0.0353 0.95 258 1.3201 0.862 0.1003 0.95 270 1.9913 0.7797 0.1475 0.95 282 0.0324 0.8432 0.0301 0.95 294 0.4804 0.7793 0.046 0.95 306 -0.4859 0.8142 0.0463 0.95 318 0.7701 0.8478 0.0634