An improved bound on the electron's electric dipole moment

• 成果类型: Article
• 署名作者: Roussy, Tanya S.; Caldwell, Luke; Wright, Trevor; Cairncross, William B.; Shagam, Yuval; Ng, Kia Boon; Schlossberger, Noah; Park, Sun Yool; Wang, Anzhou; Ye, Jun; Cornell, Eric A.
• 署名单位: National Institute of Standards & Technology (NIST) - USA; University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder; Technion Israel Institute of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-14096
• DOI: 10.1126/science.adg4084
• 发表日期: 2023-07-07
• 页码: 46-50
• 关键词: violation

摘要

The imbalance of matter and antimatter in our Universe provides compelling motivation to search for undiscovered particles that violate charge-parity symmetry. Interactions with vacuum fluctuations of the fields associated with these new particles will induce an electric dipole moment of the electron (eEDM). We present the most precise measurement yet of the eEDM using electrons confined inside molecular ions, subjected to a huge intramolecular electric field, and evolving coherently for up to 3 seconds. Our result is consistent with zero and improves on the previous best upper bound by a factor of similar to 2.4. Our results provide constraints on broad classes of new physics above 10(13) electron volts, beyond the direct reach of the current particle colliders or those likely to be available in the coming decades.