Bethe-Heitler type radiative corrections to deeply virtual neutrinoproduction of mesons

TL;DR

This paper analyzes electromagnetic Bethe-Heitler corrections to neutrino-induced meson production, showing they become significant at high Q^2 and must be considered in precision GPD studies, providing a computational tool for evaluation.

Contribution

It introduces a detailed calculation of Bethe-Heitler corrections to uDVMP and offers a computational code for their evaluation across different GPD models.

Findings

Corrections decrease less steeply with Q^2 than standard contributions.

At Q^2 ~ 100 GeV^2, corrections are comparable to the main DVMP terms.

Corrections induce angular correlations sensitive to GPD phases.

Abstract

We study the electromagnetic Bethe-Heitler type contribution to neutrino-induced deeply virtual meson production (\nuDVMP). Such O(\alpha_{em})-corrections decrease with Q^{2} in the Bjorken regime less steeply than the standard \nuDVMP handbag contribution. Therefore, they are relatively enhanced at high Q^{2}. The Bethe-Heitler terms give rise to an angular correlation between the lepton and hadron scattering planes with harmonics sensitive to the real and imaginary parts of the DVMP amplitude. These corrections constitute a few percent effect in the kinematics of the forthcoming Minerva experiment at Fermilab and should be taken into account in precision tests of GPD parametrizations. For virtualities Q^{2}~100 GeV^{2} these corrections become on a par with DVMP handbag contributions. A computational code, which can be used for the evaluation of these corrections employing various GPD models is provided.