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arXiv · 2211.13603

A study of relativistic corrections to $ J/\psi\rightarrow p\bar{p}$ decay

Nikolay Kivel
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Abstract

We study relativistic corrections in exclusive $S$-wave charmonium decays into proton-antiproton final state. We calculate the NRQCD 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 factorisation is also valid beyond the leading-order approximation. Our numerical estimates show that relativistic correction of relative order $v^2$ provides large numerical impact.

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Nikolay Kivel. 2022-11-24. A study of relativistic corrections to $ J/\psi\rightarrow p\bar{p}$ decay. https://arxiv.org/abs/2211.13603

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