Qweak Experiment: Measurement of the Proton's Weak Charge

一项寻找超越基本粒子相互作用标准模型的物理学的重大新实验即将在杰斐逊实验室开始采集数据，杰斐逊实验室是北美首屈一指的电子束加速器设施，用于核和粒子物理研究。“Qweak”实验将测量质子的弱电荷——这是决定质子对弱相互作用如何反应的基本性质。标准模型的关键预测之一是，所有相互作用的强度，以“耦合常数”为特征，实际上依赖于能量尺度。这一性质尚未对弱相互作用进行高精度测试。通过测量质子的弱电荷，我们将能够确定是否预期的弱相互作用的“运行”

A major new experiment to search for physics beyond the Standard Model of fundamental particle interactions is about to start taking data at Jefferson Laboratory, North America's premier electron beam accelerator facility for nuclear and particle physics research. The `Qweak' experiment will measure the proton's weak charge -- a basic property that determines how a proton responds to the weak interaction. One of the Standard Model's key predictions is that the strengths of all interactions, characterized by `coupling constants' are in fact energy scale dependent. This property has not yet been tested to high precision for the weak interaction. By measuring the proton's weak charge, we will be able to determine whether the anticipated `running' of the weak interaction