The NLO DGLAP extraction of αs and higher twist terms from CCFR xF3 and F2 structure functions: results and scale dependence Original Research Article

We perform a detailed NLO analysis of the combined CCFR xF3 and F2 structure functions data and extract the value of αs, parameters of distributions and higher-twist (HT) terms using a direct solution of the DGLAP equation. The value of αs(Mz) = 0.1222 ± 0.0048(exp)±0.0026(theor) is obtained. Our result has a larger central value and errors than the original one of the CCFR collaboration due to model independent parametrization of the HT contributions. The dependence of HT contributions on the QCD renormalization scale is studied.