CLAS physics database search results Measurement E92M2 EG1B run Volker Burkert 2006 -t A_UL Data errors Systematic errors dimensionless dimensionless dimensionless dimensionless 0.149 0.1837 0.0708 0.01837 0.247 0.3443 0.0744 0.03443 0.437 0.2387 0.0555 0.02387