Abstract
We study relativistic corrections to the exclusive decay of $J/\ensuremath{\psi}$ into proton-antiproton final state. We calculate the relativistic QCD corrections to the dominant decay amplitude, which depend on the nucleon twist-3 light-cone distribution amplitudes only. It is shown that in this case the collinear factorization is also valid beyond the leading-order approximation. Our numerical estimates show that relativistic correction of relative order ${v}^{2}$ provides a large numerical impact.
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