论文标题
在长距离过程中的有限体积效应和无质量的松性传播器
Finite-volume effects in long-distance processes with massless leptonic propagators
论文作者
论文摘要
在参考[1]，提出了一种方法来计算QED校正，以从晶格QCD中进行HADRONIC自能量，而没有幂律有限体积误差。在本文中，我们将方法扩展到弱相互作用中二阶发生的过程，其中存在无质量（或几乎无质量的）麻裂传播器。我们证明，尽管存在几乎无质量电子的传播器，但可以使用这种无限体积重建程序来获得稀有的Kaon Decay $ k^+k^+\toπ^+\toπ^+bar的振幅，并从晶格量子量子计算中，仅具有实用的小量子级的小小的无限制校正。
In Ref. [1], a method was proposed to calculate QED corrections to hadronic self energies from lattice QCD without power-law finite-volume errors. In this paper, we extend the method to processes which occur at second-order in the weak interaction and in which there is a massless (or almost massless) leptonic propagator. We demonstrate that, in spite of the presence of the propagator of an almost massless electron, such an infinite-volume reconstruction procedure can be used to obtain the amplitude for the rare kaon decay $K^+\toπ^+ν\barν$ from a lattice quantum chromodynamics computation with only exponentially small finite-volume corrections.
