CLAS physics database search results Measurement E151M2339 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 90 0.8478 0.8282 0.0684 0.65 66 0.196 0.9698 0.0332 0.65 90 -1.0806 0.8976 0.0839 0.65 102 -0.8825 0.922 0.0707 0.65 114 -1.2886 0.7901 0.0981 0.65 306 -0.3927 0.861 0.0414 0.75 66 -0.2589 0.8523 0.0354 0.75 78 1.4309 0.7466 0.108 0.75 102 -0.8288 0.8523 0.0672 0.75 114 -0.524 0.8029 0.0484 0.75 198 -1.3252 0.9223 0.1007 0.75 246 -0.218 0.8923 0.0339 0.85 66 -0.1021 0.7283 0.0309 0.85 78 2.5994 2.5994 0.1909 0.85 90 -0.7406 0.8407 0.0615 0.85 186 0.739 0.9475 0.0614 0.85 198 0.5428 0.9982 0.0495 0.85 210 0.328 0.7552 0.0383 0.85 222 0.2822 0.9205 0.0363 0.85 234 -0.1779 0.7695 0.0327 0.85 246 -0.9361 0.681 0.0742 0.85 258 1.1184 0.6237 0.0865 0.85 270 -0.2675 0.7059 0.0357 0.85 282 0.0367 0.7985 0.0301 0.95 198 1.1628 0.8041 0.0895 0.95 210 0.1281 0.8528 0.0314 0.95 222 0.9395 0.7617 0.0744 0.95 234 0.5822 0.8235 0.0518 0.95 246 -0.2676 0.6377 0.0357 0.95 258 0.1702 0.7157 0.0324 0.95 270 -0.1947 0.7037 0.0332 0.95 282 -0.9892 0.7171 0.0778 0.95 294 -0.0143 0.6511 0.03 0.95 306 0.3669 0.751 0.0401