Probing the transversity spin structure of a nucleon in neutrino-production of a charmed meson
B. Pire, L. Szymanowski, J. Wagner
TL;DR
This paper investigates the transversity spin structure of nucleons through neutrino-induced production of D mesons, incorporating mass effects and twist-3 contributions within a collinear QCD framework.
Contribution
It introduces the inclusion of mass terms and twist-3 contributions to analyze the transverse amplitude in exclusive neutrino D meson production, advancing understanding of transversity GPDs.
Findings
Non-zero transverse amplitude arises from mass and twist-3 effects.
Provides a theoretical framework for probing transversity GPDs via neutrino processes.
Enhances the modeling of heavy meson production in QCD.
Abstract
Including O(m_c) terms in the coefficient functions and/or O(m_D) twist 3 contributions in the heavy meson distribution amplitudes leads to a non-zero transverse amplitude for exclusive neutrino production of a D pseudoscalar charmed meson on an unpolarized target. We work in the framework of the collinear QCD approach where chiral-odd transversity generalized parton distributions (GPDs) factorize from perturbatively calculable coefficient functions.
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