Higher twist effects in charmed-strange νDIS diffraction

摘要

The non-conservation of charmed-strange current in the neutrino deep inelastic scattering (νDIS) strongly affects the longitudinal structure function, FL , at small values of Bjorken x. The orresponding correction to F L is a higher twist effect enhanced at small x by the rapidly growing gluon density factor. As a result,the component of FL induced by the charmed-strange current prevails over the light-quark component and dominates FL = F cs L+ F ud L at x 0.01 and Q 2 - m2 c . The color dipole analysis clarifies the physics behind the phenomenon and provides a quantitative estimate of the effect.