缪子在标准模型中的反常磁矩:最新进展
The anomalous magnetic moment of the muon in the Standard Model: an update

原始链接: https://arxiv.org/abs/2505.21476

arXivLabs是一个框架,允许合作者直接在我们的网站上开发和分享新的arXiv功能。与arXivLabs合作的个人和组织都已接受并认同我们开放、社区、卓越和用户数据隐私的价值观。arXiv致力于这些价值观,并且只与遵守这些价值观的合作伙伴合作。是否有能为arXiv社区增值的项目想法?了解更多关于arXivLabs的信息。

A recent paper updates the Standard Model's prediction of the muon's anomalous magnetic moment, addressing a long-standing discrepancy between theory and experiment. The original difference of 3.5 standard deviations sparked excitement about potential "new physics" beyond the Standard Model. The discrepancy arose because there are two methods to make the prediction: a "data-driven" approach using experimental interaction rates and a "brute-force" method using Lattice QCD simulation. One important measured interaction rate was significantly updated. This measurement disagreed with previous measurement, and made the data-driven method worse. The "brute force" Lattice QCD calculation got better and is now in line with the experimental value. The mystery is resolved by switching from the "data-driven" method to the Lattice QCD simulation. While this resolution is important, some commenters express mild disappointment as an anomaly would imply scientific revolution. It also highlights the ongoing evolution of the Standard Model, its successes, and its known limitations (like gravity and neutrino mass). Some say that this is not truly a part of the Standard Model and is just an add-on.

原文

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.

联系我们 contact @ memedata.com