Talk presented by Stefano Capitani

Parallel Session: Matrix Elements II

Thursday July 1st, 17.00 - 17.20, Auditorium

Higher twist contributions to the Structure Functions coming from 4-fermion operators

Abstract: We evaluate the contribution of a class of higher twist operators to the lowest moment of the Structure Functions, by computing appropriate matrix elements of six four-fermion operators in the quenched approximation. Their perturbative renormalization constants and mixing coefficients are calculated in the 't Hooft-Veltman scheme of dimensional regularization, using codes written in the algebraic manipulation computer language FORM.

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