CLAS physics database search results Measurement E151M1173 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.45 270 -0.4638 0.8009 0.0453 0.55 138 -0.5916 0.9295 0.0526 0.65 126 -2.5152 0.4361 0.1863 0.65 138 -1.1238 0.7693 0.0874 0.65 198 0.1968 1.0006 0.0333 0.65 210 -0.8468 0.827 0.0688 0.65 270 -1.3567 0.6335 0.1036 0.65 282 -0.66 0.8097 0.0568 0.75 90 0.7487 0.9552 0.0624 0.75 102 -0.2878 0.6453 0.0366 0.75 114 0.1951 0.9215 0.0332 0.75 186 -0.5174 0.8662 0.0483 0.75 198 -0.2191 0.7376 0.034 0.75 210 0.7058 0.8458 0.0597 0.75 222 1.9574 0.8871 0.1462 0.75 258 -0.2001 0.9255 0.0334 0.75 270 1.5336 0.8819 0.116 0.75 282 -0.9595 0.6179 0.0763 0.85 90 -0.071 0.8196 0.0304 0.85 102 -0.143 0.6904 0.0318 0.85 114 0.7942 0.8004 0.0653 0.85 126 -0.4567 0.729 0.0449 0.85 138 1.1365 0.9309 0.0883 0.85 174 0.7625 0.9122 0.0633 0.85 186 0.7002 0.7664 0.0593 0.85 198 -0.0546 0.5999 0.0303 0.85 210 -0.6051 0.5434 0.0534 0.85 222 0.2552 0.8017 0.0353 0.85 234 -0.3688 0.9186 0.0403 0.85 270 -0.704 0.7816 0.0596 0.85 282 -0.6422 0.7159 0.0557 0.95 210 0.7392 0.966 0.0618 0.95 222 0.6765 0.9469 0.0578