Determination of the high-twist contribution to the structure function xFνN3

Abstract We extract the high-twist contribution to the neutrino–nucleon structure function xF 3 (ν+ ν )N from the analysis of the data collected by the IHEP-JINR Neutrino Detector in the runs with the focused neutrino beams at the IHEP 70 GeV proton synchrotron. The analysis is performed within the infrared renormalon (IRR) model of high twists in order to extract the normalization parameter of the model. From the NLO QCD fit to our data we obtain the value of the IRR model normalization parameter Λ 2 3 =0.69±0.37 (exp)±0.16 (theor) GeV 2 . We also obtain Λ 2 3 =0.36±0.22 (exp)±0.12 (theor) GeV 2 from a similar fit to the CCFR data. The average of both results is Λ 2 3 =0.44±0.19 (exp) GeV 2 .