Power corrections to the structure functions of proton and deuteron Original Research Article

Power corrections to the Q2 behaviour of the low-order moments of both the longitudinal and transverse structure functions of proton and deuteron have been investigated using available phenomenological fits of existing data in the Q2 range between 1 and 20 (GeV/c)2. The contributions of (target-dependent) multiparton correlations to both View the MathML source and View the MathML source power terms have been determined in the transverse channel, while the longitudinal data appear to be consistent with a pure (target-independent) renormalon picture. Finally, the extracted twist-2 contribution is found to be compatible with the hypothesis of an enhanced d-quark parton distribution at large x.