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Probing Fundamental Symmetries of Deformed Nuclei in Symmetric Top Molecules

Yu, Phelan and Hutzler, Nicholas R. (2021) Probing Fundamental Symmetries of Deformed Nuclei in Symmetric Top Molecules. Physical Review Letters, 126 (2). Art. No. 023003. ISSN 0031-9007. doi:10.1103/PhysRevLett.126.023003.

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Precision measurements of Schiff moments in heavy, deformed nuclei are sensitive probes of beyond standard model T, P violation in the hadronic sector. While the most stringent limits on Schiff moments to date are set with diamagnetic atoms, polar polyatomic molecules can offer higher sensitivities with unique experimental advantages. In particular, symmetric top molecular ions possess K doublets of opposite parity with especially small splittings, leading to full polarization at low fields, internal comagnetometer states useful for rejection of systematic effects, and the ability to perform sensitive searches for T, P violation using a small number of trapped ions containing heavy exotic nuclei. We consider the symmetric top cation ²²⁵RaOCH⁺₃ as a prototypical and candidate platform for performing sensitive nuclear Schiff measurements and characterize in detail its internal structure using relativistic ab initio methods. The combination of enhancements from a deformed nucleus, large polarizability, and unique molecular structure make this molecule a promising platform to search for fundamental symmetry violation even with a single trapped ion.

Item Type:Article
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URLURL TypeDescription Paper InPhysics: Viewpoint
Yu, Phelan0000-0002-3715-9133
Hutzler, Nicholas R.0000-0002-5203-3635
Additional Information:© 2021 American Physical Society. Received 21 August 2020; accepted 24 November 2020; published 11 January 2021. We are grateful for extensive assistance from Anastasia Borschevsky and Y. A. Chamorro Mena with the ab initio calculations, and to Ben Augenbraun, Mingyu Fan, Alex Frenett, Arian Jadbabaie, Andrew Jayich, Ivan Kozyryev, Zack Lasner, and Tim Steimle for helpful discussions and feedback. This research was supported by a NIST Precision Measurement Grant (60NANB18D253), the Gordon and Betty Moore Foundation (7947), and the Alfred P. Sloan Foundation (G-2019-12502). Computations in this Letter were performed on the Caltech High Performance Cluster.
Funding AgencyGrant Number
National Institute of Standards and Technology (NIST)60NANB18D253
Gordon and Betty Moore Foundation7947
Alfred P. Sloan FoundationG-2019-12502
Issue or Number:2
Record Number:CaltechAUTHORS:20200918-103034669
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105449
Deposited By: Tony Diaz
Deposited On:18 Sep 2020 18:01
Last Modified:16 Nov 2021 18:43

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