Charged current electroproduction of a charmed meson at an electron-ion collider

Abstract

We calculate the amplitude for exclusive electroweak production of a pseudoscalar $D_s$ or a vector $D_s^{\ast }$ charmed strange meson on an unpolarized nucleon, through a charged current, in leading order in ${\alpha }_s$. We work in the framework of the collinear QCD approach where generalized gluon distributions factorize from perturbatively calculable coefficient functions. We include both $O(m_c)$ terms in the coefficient functions and $O(M_D)$ mass term contributions in the heavy meson distribution amplitudes. We show that this process may be accessed at future electron-ion colliders.

arXiv admin note: text overlap with arXiv:1702.00316

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• Probing $D_s^{\ast }$-meson longitudinal twist-2 LCDA
• Chiral-odd generalized parton distributions for the low-lying octet baryons