Flavor structure of generalized parton distributions from neutrino experiments

TL;DR

This paper extends the analysis of deeply virtual meson production to neutrino-induced processes, expressing cross-sections in terms of proton GPDs, and suggests experimental feasibility at MINERvA for probing GPD flavor structure.

Contribution

It introduces a method to analyze neutrino-induced meson production using SU(3) relations and provides a computational tool for evaluating cross-sections with various GPD models.

Findings

Cross-sections expressed in terms of proton GPDs.

Feasibility of studying these processes at MINERvA.

Potential to extract GPD flavor structure from neutrino data.

Abstract

The analysis of deeply virtual meson production is extended to neutrino-production of the pseudo-Goldstone mesons (pions, kaons, eta-mesons) on nucleons, with the flavor content of the recoil baryon either remaining intact, or changing to a hyperon from the SU(3) octet. We rely on the SU(3) relations and express all the cross-sections in terms of the proton generalized parton distributions (GPDs). The corresponding amplitudes are calculated at the leading twist level and in the leading order in \alpha_{s}, using a phenomenological parametrization of GPDs. We provide a computational code, which can be used for evaluation of the cross-sections employing various GPD parametrizations. We conclude that these processes can be studied in the experiment Minerva at FERMILAB, which could supplement the measurements at JLAB and help to extract the GPD flavor structure from data.