改进的 $B\to K^*_0\left(1430\right)$ 跃迁形状因子在光锥求和规则中的次领头阶计算
Improved $B\to K^*_0\left(1430\right)$ transition form factors at next-to-leading order in light cone sum rules
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中文总结 AI 辅助
本文利用光锥求和规则,在次领头阶包含辐射修正,改进了 $B\to K_0^*(1430)$ 跃迁形状因子的计算,并量化了主要理论不确定性来源。
中文摘要 AI 辅助
我们利用光锥求和规则(LCSR)并在光锥附近展开,提出了对 $B\to K_0^*(1430)$ 跃迁形状因子的改进确定。我们包含了标量介子的 twist-2 和渐近 twist-3 分布振幅的单圈辐射修正,并在 $\overline{\mathrm{MS}}$ 方案中一致地进行了计算。这使我们能够量化辐射修正对每个 twist 形状因子的影响。我们使用 $B\to K_0^*(1430)$ LCSR 的派生求和规则来同时确定 Borel 质量和阈值参数。我们发现主要的理论不确定性来自 $K_0^*(1430)$ 的分布振幅及其衰变常数。我们的结果以一种便于纳入这些非微扰输入(包括来自格点 QCD 和实验测量的改进)的形式呈现,并且可以很容易地推广到其他标量介子。
英文摘要
We present an improved determination of the $B\to K_0^*(1430)$ transition form factors using light-cone sum rules (LCSR) with an expansion near the light cone. We include the one-loop radiative corrections to the twist-2 and asymptotic twist-3 distribution amplitudes of the scalar meson and perform the calculation consistently in the $\overline{\mathrm{MS}}$ scheme. It allowed us to quantify the impact of radiative corrections on the form factors for each twist. A daughter sum rule is used from the $B\to K_0^*(1430)$ LCSR to ascertain Borel mass and threshold parameter simultaneously. We find that the dominant theoretical uncertainties arise from the $K_0^*(1430)$ distribution amplitudes and its decay constant. Our results are presented in a form that facilitates the incorporation of future improvements in these nonperturbative inputs, including those from lattice QCD and experimental measurements, and can be readily extended to other scalar mesons.
发表机构
- Quaid-i-Azam University(真纳大学)
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