CLAS physics database search results Measurement E151M234 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.65 234 0.1165 0.6468 0.0308 0.65 246 0.1095 0.5251 0.0307 0.65 258 0.0185 0.5627 0.03 0.65 270 -1.0454 0.3619 0.0697 0.75 162 0.88 0.9203 0.0609 0.75 234 -0.4166 0.6034 0.0391 0.75 246 -0.1201 0.5077 0.0309 0.75 258 0.0141 0.5149 0.03 0.75 270 0.5597 0.7002 0.0451 0.85 162 0.5207 0.937 0.0434 0.85 234 -0.8482 0.4189 0.0592 0.85 246 -0.3901 0.5202 0.0381 0.85 258 -0.1379 0.6058 0.0311 0.55 246 -0.0476 0.5196 0.0301 0.55 258 -0.1435 0.5174 0.0313 0.65 234 -0.2072 0.4998 0.0326 0.65 246 -0.1126 0.3763 0.0308 0.65 258 -0.3698 0.3492 0.0377 0.65 270 0.0811 0.4339 0.0304 0.75 150 -0.5809 0.4737 0.0468 0.75 234 0.5807 0.503 0.0468 0.75 246 0.0178 0.3906 0.03 0.75 258 0.3907 0.4118 0.0385 0.75 270 -0.5037 0.3716 0.0433 0.85 234 0.4978 0.4846 0.043 0.85 246 -0.0661 0.4469 0.0303 0.85 258 0.007 0.3994 0.03