CLAS physics database search results Measurement E151M2257 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.25 54 -0.3385 0.8593 0.0388 0.25 66 -0.4797 0.9265 0.0459 0.25 294 0.2382 0.9316 0.0346 0.35 78 -0.1937 0.7245 0.0331 0.35 282 1.2467 0.8162 0.0953 0.35 294 0.5681 0.8789 0.051 0.45 270 -0.0167 0.8018 0.03 0.45 282 -0.9019 0.8373 0.0719 0.55 54 0.453 0.9059 0.0445 0.55 102 1.067 0.7424 0.083 0.55 126 0.3994 0.911 0.0417 0.55 282 -1.1916 0.7953 0.0915 0.65 90 -0.9896 0.9052 0.0778 0.65 102 1.3659 0.8148 0.1035 0.65 114 -0.1745 0.8389 0.0326 0.65 126 0.3429 0.8487 0.039 0.65 138 2.4208 0.7619 0.1781 0.65 234 -0.4633 0.779 0.045 0.65 246 0.392 0.8308 0.0413 0.75 102 0.8273 0.688 0.0671 0.75 114 -1.5367 0.5097 0.1154 0.75 126 2.1641 0.6358 0.1598 0.75 138 -0.6102 0.8727 0.0535 0.75 210 1.4754 0.7855 0.1111 0.75 222 -0.7805 0.7742 0.0641 0.75 234 0.0437 0.7408 0.0302 0.75 246 -0.5976 0.8475 0.0527 0.75 258 0.131 0.6919 0.0315 0.85 78 1.3904 0.8313 0.1052 0.85 90 -0.9378 1.0688 0.0743 0.85 114 0.7663 0.616 0.0631 0.85 126 -0.0219 0.7032 0.03 0.85 138 0.6181 0.8516 0.0539 0.85 210 0.7094 1.0556 0.0595 0.85 222 0.3329 0.7352 0.0385 0.85 234 0.336 0.6381 0.0386 0.85 246 0.2694 0.6319 0.0358 0.85 258 0.1199 0.6501 0.0312 0.85 270 0.0492 0.8244 0.0302 0.95 222 0.256 0.7789 0.0353 0.95 246 0.9101 0.7179 0.0725 0.95 258 -0.0799 0.6086 0.0306 0.95 270 0.4265 0.7152 0.0431