CLAS physics database search results Measurement E151M542 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.35 66 -0.3538 0.4841 0.037 0.55 270 -0.3846 0.6381 0.0381 0.65 102 -0.2513 0.5728 0.0337 0.65 270 -0.6583 0.5193 0.0502 0.75 78 -0.3216 0.6326 0.0359 0.75 90 0.4134 0.5939 0.0392 0.75 102 -0.112 0.4728 0.0308 0.75 114 0.0736 0.6321 0.0303 0.75 234 0.0091 0.6591 0.03 0.75 246 0.5043 0.6417 0.043 0.75 258 0.3235 0.5408 0.0359 0.75 270 -0.6879 0.4336 0.0517 0.75 282 -0.143 0.5325 0.0312 0.75 294 -0.5088 0.4795 0.0432 0.85 90 0.5685 0.4845 0.0459 0.85 102 1.3122 0.4881 0.0857 0.85 114 -0.4812 0.4879 0.042 0.85 126 0.8341 0.6806 0.0592 0.85 138 0.6942 0.6468 0.052 0.85 222 -0.6386 0.5429 0.0492 0.85 234 -0.2649 0.5149 0.0341 0.85 246 -0.0147 0.4852 0.03 0.85 258 -0.4168 0.4863 0.0394 0.85 270 -1.2704 0.4086 0.0833 0.85 282 0.1473 0.4507 0.0313 0.85 294 1.8461 0.4135 0.1168 0.85 306 0.7537 0.7101 0.055 0.95 102 -0.4276 0.5712 0.0398 0.95 114 -0.2945 0.5287 0.035 0.95 126 0.9526 0.5857 0.0655 0.95 246 0.0868 0.5542 0.0305 0.95 258 0.6697 0.4403 0.0508 0.95 270 -0.4426 0.4856 0.0404 0.95 282 -1.0901 0.337 0.0731 0.95 294 -0.2273 0.5221 0.0331