CLAS physics database search results Measurement E151M1588 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 42 -1.6526 0.8048 0.1035 0.55 162 -1.5724 0.8461 0.0989 0.55 222 -0.8611 0.607 0.0591 0.55 234 -0.9176 0.5644 0.0673 0.65 126 0.2357 0.9332 0.0332 0.65 138 1.7618 0.7901 0.1098 0.65 222 -1.434 0.5121 0.0903 0.75 222 -0.7958 0.6861 0.0563 0.75 234 0.2465 0.8147 0.0334 0.75 246 -3.2747 3.2747 0.1985 0.85 222 -0.1201 0.8492 0.0309 0.85 234 -0.0971 0.856 0.0306 0.65 234 -1.6114 0.8035 0.0984 0.75 210 -2.024 0.6799 0.1215 0.75 222 -1.2729 0.9834 0.0799 0.75 234 -0.4855 0.9033 0.0412 0.85 210 -1.2504 0.8009 0.0787 0.85 222 0.2503 1.0256 0.0333 0.85 234 1.0469 0.8943 0.0679