Distribution Amplitudes of K and φ at the Physical Pion Mass from Lattice QCD
Distribution Amplitudes of K and φ at the Physical Pion Mass from Lattice QCD
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来自晶格 QCD 的物理 Pion 质量处的 K 和 Ï 分布幅度
DOI：
10.1103/physrevlett.127.062002
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发表时间：
2021
影响因子：
8.6
通讯作者：
Qi-An Zhang
中科院分区：
文献类型：
--
作者：
Jun Hua;Min-Huan Chu;Peng Sun;Wei Wang;Ji Xu;Yi-Bo Yang;Jian-Hui Zhang;Qi-An Zhang
利用大动量有效理论，首次用晶格QCD计算了纵向和横向极化矢量介子的分布振幅。我们使用三叶草费米子作用于三个具有高度改进的交错夸克作用的系综，这三个系综是由MIMD晶格计算合作产生的，在物理π质量和晶格间距下，并选择了三个不同的强子动量。在最近提出的一种混合格式中，所得到的晶格矩阵元是非微扰重整化的。对连续体和无限动量极限进行了外推。我们发现，虽然纵向分布幅度趋于接近渐近形式，但横向分布幅度偏离渐近形式相当明显。我们的最终结果为分析相关的排他性过程提供了CRICIALAB的初始理论输入。
We present the first lattice QCD calculation of the distribution amplitudes of longitudinally and transversely polarized vector mesonsandusing large momentum effective theory. We use the clover fermion action on three ensembles withflavors of highly improved staggered quarks action, generated by the MIMD Lattice Computation Collaboration, at physical pion mass andlattice spacings and choose three different hadron momenta. The resulting lattice matrix elements are nonperturbatively renormalized in a recently proposed hybrid scheme. An extrapolation to the continuum and infinite momentum limit is carried out. We find that, while the longitudinal distribution amplitudes tend to be close to the asymptotic form, the transverse ones deviate rather significantly from the asymptotic form. Our final results provide crucialab initiotheory inputs for analyzing pertinent exclusive processes.