eEDM:Measurement of the electron electric dipole moment

基本粒子物理学的标准模型预测电子的电偶极矩（eEDM）太小而无法测量。然而，标准模型的现代扩展-例如超对称理论或其他具有额外粒子或场的理论-预测的值在实验可及的范围内。因此，eEDM测量是对标准模型之外的物理的探索。由于永久电子电火花加工违反了时间反转对称性，它也与CP违逆和宇宙中物质与反物质之间的明显不对称性的重要问题密切相关。我们现在正在进行迄今为止最灵敏的eEDM测量，这是一种测试新物理学理论的测量。我们的方法使用激光操纵冷极性分子，最终将被困在超低温下。与目前的最佳测量方法相比，该方法有望将eEDM搜索的精度提高2-3个数量级。在这一滚动赠款建议中，我们正在寻求对一项使我们能够实现这一承诺的持续发展方案的支持。这提供了令人兴奋的前景，要么检测到非零eEDM，要么为新物理学排除很大一部分模型。

The Standard Model of elementary particle physics predicts that the electric dipole moment of the electron (eEDM) is far too small to measure. However, modern extensions to the standard model - e.g. supersymmetric theories or other theories with additional particles or fields - predict values in the range accessible to experiment. Hence, the eEDM measurement is a search for physics beyond the standard model. Since a permanent electron EDM violates time-reversal symmetry, it is also deeply connected to the important issue of CP violation and the apparent asymmetry between matter and antimatter in the universe. We are now in the middle of making the most sensitive eEDM measurement to date, a measurement that tests theories of new physics. Our method uses laser manipulation of cold polar molecules, which will eventually be trapped at ultra-low temperature. This approach has the promise of improving on the precision of the eEDM search by 2-3 orders of magnitude compared with the current best measurement. In this rolling-grant proposal, we are seeking support for an ongoing programme of development that will allow us to realise this promise. This offers the exciting prospect of either detecting a non-zero eEDM or excluding a large fraction of the models for new physics.