We calculate the twist-four, spin-two contributions to the lowest moments of the structure functions F1, F2, and F3 for isoscalar targets. We argue and show explicitly that the effect on R and R is mainly coming from the four-quark operators in the operator-product expansion. The matrix elements of these operators can be calculated using the MIT bag model. The uncertainty in the determination of sin2W due to the higher-twist effects is about 1%.
Twist-Four Corrections To Charged And Neutral Current Neutrino Scattering
CASTORINA, Paolo
Primo
;
1985-01-01
Abstract
We calculate the twist-four, spin-two contributions to the lowest moments of the structure functions F1, F2, and F3 for isoscalar targets. We argue and show explicitly that the effect on R and R is mainly coming from the four-quark operators in the operator-product expansion. The matrix elements of these operators can be calculated using the MIT bag model. The uncertainty in the determination of sin2W due to the higher-twist effects is about 1%.File in questo prodotto:
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