Measurements ofF2andxF3ν−xF3ν¯from CCFRνμ-Fe andν¯μ-Fe Data in a Physics Model-Independent Way

We report on the extraction of the structure functions $F_2$ and $\Delta {\mathrm{xF}}_3{=xF}_3^{\nu }{-xF}_3^{\overline{\nu }}$ from CCFR ${\nu }_{\mu }$-Fe and ${\overline{\nu }}_{\mu }$-Fe differential cross sections. The extraction is performed in a physics model-independent (PMI) way. This first measurement of $\Delta {\mathrm{xF}}_3$, which is useful in testing models of heavy charm production, is higher than current theoretical predictions. The ratio of the $F_2$ (PMI) values measured in ${\nu }_{\mu }$ and $\mu$ scattering is in agreement (within $5\%$) with the predictions of next-to-leading-order parton distribution functions using massive charm production schemes, thus resolving the long-standing discrepancy between the two sets of data.