Full of charm neutrino DIS

TL;DR

This paper uses the color dipole model and BFKL approach to analyze small-x neutrino deep inelastic scattering, predicting a rapid rise of the charm-strange component of the longitudinal structure function at small x.

Contribution

It provides the first quantitative predictions for the charm-strange contribution to $F_L$ in neutrino DIS using DLLA resummation within the color dipole BFKL framework.

Findings

Charm-strange component of $F_L$ rises faster than light quark component at small x.

Ordering of dipole sizes consistent with DLLA is observed.

Quantitative predictions align with the kinematic range of CCFR/NuTeV experiments.

Abstract

The color dipole analysis of small-$(x, Q^2)$ neutrino DIS induced by the charmed-strange ($cs$) current reveals ordering of dipole sizes $m_c^{-2}<r^2<m_s^{-2}$ typical of the Double Leading Log Approximation (DLLA). The DLLA resummation leads to the $cs$ component of the longitudinal structure function $F_L$ rising to small $x$ much faster than its light quark component. Based on the color dipole BFKL approach we report quantitative predictions for this effect in the kinematical range of the CCFR/NuTeV experiment.