Higher twist contributions to the structure functions F2p(x,Q2) and F2d(x,Q2) at large x at higher orders

The higher twist contributions to the deeply inelastic structure functions F2p(x,Q2) and F2d(x,Q2) for larger values of the Bjorken variable x are extracted extrapolating the twist-2 contributions measured in the large W2 region to the region 4 GeV2⩽W2⩽12.5 GeV2 applying target mass corrections. We compare the results for the NLO, NNLO and N3LO analyzes and include also the large x at N4LO to the Wilson coefficients. A gradual lowering of the higher twist contributions going from NLO to N4LO is observed, which stresses the importance of higher order corrections.