F_2 Structure Function and Higher-twist Contributons (Nonsinglet Case)

Abstract

We performed the combine fits of SLAC, BCDMS and NMC data at NLO level. The data are fitted very well with different parametrizations of higher twist contributions. The theory-based parametrizations lead to the low values of QCD parameter \Lambda^{f=4}_{\overfull{MS}} \sim 140 \pm 21 MeV (or \alpha_s(M^2_Z)= 0.103 \pm 0.002).

Comments: 4 pages, latex. Talk presented at the DIS98 workshop, Brussels, April 1998