Measurement of a Lepton Lepton Electroweak Reaction (MOLLER): An Ultraprecise Measurement of the Weak Mixing Angle using Møller Scattering at Jefferson Laboratory

希格斯玻色子在欧洲核子研究中心的发现是对标准模型的期待已久的验证，标准模型总结了我们目前对基本粒子及其相互作用的理解。四种基本力是引力、电磁力、弱核力和强核力。普通物质由基本粒子的子集组成，电子和上夸克和下夸克在原子核中以质子和中子的形式结合在一起。电磁力和弱力已经被成功地统一到量子电弱理论中，而将其他两种力统一起来也是亚原子理论家的目标。尽管标准模型取得了成功，但它并不完整。宇宙中大约97%的物质和能量是未知的;这些“暗”物质和能量需要从天体物理学的观测来解释星系的旋转速率，但尚未包括在标准模型中。此外，两个最精确的测量弱混合角的质量的Z玻色子，这是媒介的弱力，不同意对方或测量质量的希格斯玻色子。

The discovery of the Higgs boson at CERN was the long-awaited validation of the Standard Model, which summarizes our current understanding of fundamental particles and their interactions. The four fundamental forces are the gravitational, electromagnetic, weak and strong nuclear forces. Ordinary matter consists of a subset of the fundamental particles, electrons and up- and down- quarks bound together as protons and neutrons in the nucleus. The electromagnetic and weak forces have been successfully unified into a quantum electroweak theory, and it is a goal of subatomic theorists to unify the other two forces as well. Despite the success of the Standard Model, it is not complete. Approximately 97% of the matter and energy in the universe is unknown; this "dark" matter and energy is needed to explain the rotation rates of galaxies from astrophysical observations, but is not yet included in the Standard Model. In addition, the two most precise measurements of the weak mixing angle at the mass of the Z boson, which is the mediator of the weak force, do not agree with each other or the measured mass of the Higgs.