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arXiv · 2606.28494

Soft Contributions Stabilize NNLO QCD Corrections to Quarkonium Production and Decay

Luca Maxia·Hua-Sheng Shao·Lukas Simon·Guoxing Wang
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Abstract

Next-to-next-to-leading order (NNLO) QCD corrections to quarkonium production and decay are known to exhibit perturbative instabilities within non-relativistic QCD. We identify the origin of this problem and propose a simple remedy. Applying our approach to $S$-wave color-singlet quarkonium processes, we achieve substantially improved perturbative convergence and agreement with experimental data.

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Luca Maxia, Hua-Sheng Shao, Lukas Simon, Guoxing Wang. 2026-06-26. Soft Contributions Stabilize NNLO QCD Corrections to Quarkonium Production and Decay. https://arxiv.org/abs/2606.28494

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