AI 中文总结
针对未来J-PARC实验的高能π介子和K介子束诱发的单举Drell-Yan过程，在广义部分子分布因子化框架内计算次领头阶QCD修正，发现其修正大且为正，对可靠理论预测及与未来实验对比很关键。
AI 中文摘要
为未来J-PARC实验所提议的高能π介子和K介子束，为研究由π介子或K介子诱发的单举Drell-Yan过程提供了独特机遇，此过程对应于 $M = \pi, K$ 时的逆深度非弹性介子产生。为便于理论预测与即将到来的实验数据精确比较，我们计算了 $\pi^- p\to \gamma^*(\to l^+l^-) + n$ 和 $K^- p\to \gamma^*(\to l^+l^-) + \Lambda$ 过程的次领头阶QCD修正。计算在广义部分子分布（GPD）因子化框架内进行，在广义Bjorken极限下准确到领头扭转。结果表明，次领头阶QCD修正很大且为正，对与未来实验对比的可靠理论预测而言，纳入这些修正是必要的。
英文摘要
The high-energy pion and kaon beams proposed for future experiments at J-PARC offer a unique opportunity to investigate exclusive Drell-Yan processes induced by pions or kaons, which correspond to inverse deeply virtual meson production with $M=π,K$. To facilitate precise comparisons between theoretical predictions and forthcoming experimental data, we calculate the next-to-next-to-leading order (NNLO) QCD corrections to the processes $π^- p\to γ^*(\to l^+l^-) + n$ and $K^- p\to γ^*(\to l^+l^-) + Λ$. Our calculations are performed within the generalized parton distribution (GPD) factorization framework, accurate to leading twist in the generalized Bjorken limit ($Q^2\gg |t|,\,Λ_{\rm QCD}^2$). We find that the NNLO QCD corrections are substantial and positive; therefore, their inclusion is imperative for reliable theoretical predictions in confrontation with future experiments.
Comments10 pages, 1 table, 7 figures
