迷人的达尔文：QCD参数在不同粲强子种类中的演化
Charming Darwin: the evolution of QCD parameters across different species
AI总结：
本文研究利用BESIII单举粲强子衰变谱矩测量HQE参数（动能、色磁矩、达尔文项）的可行性，并探讨其对确定$|V_{cs}|$的灵敏度。
摘要：
我们探索利用BESIII对单举粲介子衰变谱矩进行测量的前景。BESIII拥有的粲介子和粲重子数据样本丰富且异常干净，为研究重夸克展开（HQE）参数在不同粲强子种类中的演化提供了独特的实验室，并有助于揭示重夸克动力学与轻夸克效应之间的相互作用。以重介子质量倒数的幂次展开的HQE在 beauty 衰变中已经很好地建立，但由于粲夸克质量较轻，其对粲强子的适用性仍是一个悬而未决的问题。迄今为止，尚未有人尝试确定HQE参数，即动能项、色磁矩项和达尔文项。这里特别重要的是达尔文算符和弱湮灭算符，它们的数值对于预言重强子寿命至关重要。利用BESIII探测器响应的快速模拟以及对谱矩的预言，我们研究了在现有和未来可能的数据集下对HQE参数的灵敏度。此外，我们讨论了HQE应用于粲强子的理论挑战和实验限制。我们进一步研究了利用单举半轻粲介子衰变确定CKM矩阵元$|V_{cs}|$的灵敏度。
英文摘要：
We explore the prospects of measurements of spectral moments of inclusive charm decays with BESIII. The rich and uniquely clean data set of charm mesons and baryons at BESIII offers a unique laboratory to study the evolution of Heavy Quark Expansion (HQE) parameters across different charm hadron species and to shed light on the interplay between heavy quark dynamics and light quark effects. The HQE in terms of inverse powers of the heavy meson mass is well-established in beauty decays, however due to the lighter charm mass its applicability to charm remains an open question. To date no determination of the HQE parameters, the kinetic energy, chromomagnetic moment and Darwin terms, has been attempted. A particularly important role here is given to the Darwin and weak annihilation operators, whose values are important to predict lifetimes of heavy hadrons. Using a fast simulation for the BESIII detector response and predictions for spectral moments, we investigate the sensitivity to HQE parameters with today's and possible future data sets. In addition, we discuss the theory challenges for the HQE in charm and the experimental limitations. We further investigate the sensitivity of determining the CKM matrix element $|V_{cs}|$ with inclusive semileptonic charm decays.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
