QED Corrections to Hadronic Observables
QED Corrections to Hadronic Observables
复制标题
对强子可观测值的 QED 修正
DOI：
10.22323/1.256.0020
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
A. Patella
中科院分区：
文献类型：
--
作者：
A. Patella
当以晶格模拟计算的强子量的百分比精度为目标时，同位旋破缺效应就变得重要起来。它们有两种：上下质量分裂和电磁修正。为了正确地解释后者，需要在有限体积内对带电状态进行一致的表述。事实上，在周期性环面上，高斯定律和大尺度变换禁止带电态的传播。在这次演讲中，我将回顾到目前为止已经使用或提出的方法，以避免这个问题，同时强调实际和概念上的利弊。我还将回顾和讨论在数值模拟中计算强子质量和衰变率的电磁修正的各种方法。
When aiming at the percent precision in hadronic quantities calculated by means of lattice simulations, isospin breaking effects become relevant. These are of two kinds: up/down mass splitting and electromagnetic corrections. In order to account properly for the latter, a consistent formulation of electrically-charged states in finite volume is needed. In fact on a periodic torus Gauss law and large gauge transformations forbid the propagation of electrically-charged states. In this talk I will review methods that have been used or proposed so far in order to circumvent this problem, while highlighting practical as well as conceptual pros and cons. I will also review and discuss various methods to calculate electromagnetic corrections to hadron masses and decay rates in numerical simulations.
影响因子：
56.9
作者：
Borsanyi, Sz.;Durr, S.;Toth, B. C.
通讯作者：
Toth, B. C.