Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts
Abstract
Searches for permanent electric dipole moments (EDMs) of fundamental particles, atoms and molecules are promising experiments to constrain and potentially reveal beyond Standard Model (SM) physics. A non-zero EDM is a direct manifestation of time-reversal (T) violation, and, equivalently, violation of the combined operation of charge-conjugation (C) and parity inversion (P). Identifying new sources of CP violation can help to solve fundamental puzzles of the SM, e.g., the observed baryon-asymmetry in the Universe. Theoretical predictions for magnitudes of EDMs in the SM are many orders of magnitude below current experimental limits. However, many theories beyond the SM require larger EDMs. Experimental results, especially when combined in a global analysis, impose strong constraints on CP violating model parameters. Including an overview of EDM searches, I will focus on the future neutron EDM experiment at TRIUMF (Vancouver). For this effort, the TUCAN (TRIUMF Ultra Cold Advanced Neutron source) collaboration is aiming to build a strong, world leading source of ultra cold neutrons (UCN) based on a unique combination of a spallation target and a superfluid helium UCN converter. Another focus will be the search for an EDM of the diamagnetic atom 129 Xe using a 3 He comagnetometer and SQUID detection. Themore »
- Publication Date:
- Research Org.:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Org.:
- TUCAN Collaboration; HeXeEDM Collaboration
- OSTI Identifier:
- 1609531
- Grant/Contract Number:
- FG02-04ER41331
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Universe
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 2; Conference: 7. International Conference on New Frontiers in Physics (ICNFP 2018), Crete (Greece), 4-12 Jul 2018; Journal ID: ISSN 2218-1997
- Publisher:
- MDPI
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Astronomy & Astrophysics; Physics; electric dipole moment; EDM; CP violation; new physics; neutron; xenon
Citation Formats
Kuchler, Florian. Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts. United States: N. p., 2019.
Web. doi:10.3390/universe5020056.
Kuchler, Florian. Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts. United States. https://doi.org/10.3390/universe5020056
Kuchler, Florian. Sat .
"Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts". United States. https://doi.org/10.3390/universe5020056. https://www.osti.gov/servlets/purl/1609531.
@article{osti_1609531,
title = {Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts},
author = {Kuchler, Florian},
abstractNote = {Searches for permanent electric dipole moments (EDMs) of fundamental particles, atoms and molecules are promising experiments to constrain and potentially reveal beyond Standard Model (SM) physics. A non-zero EDM is a direct manifestation of time-reversal (T) violation, and, equivalently, violation of the combined operation of charge-conjugation (C) and parity inversion (P). Identifying new sources of CP violation can help to solve fundamental puzzles of the SM, e.g., the observed baryon-asymmetry in the Universe. Theoretical predictions for magnitudes of EDMs in the SM are many orders of magnitude below current experimental limits. However, many theories beyond the SM require larger EDMs. Experimental results, especially when combined in a global analysis, impose strong constraints on CP violating model parameters. Including an overview of EDM searches, I will focus on the future neutron EDM experiment at TRIUMF (Vancouver). For this effort, the TUCAN (TRIUMF Ultra Cold Advanced Neutron source) collaboration is aiming to build a strong, world leading source of ultra cold neutrons (UCN) based on a unique combination of a spallation target and a superfluid helium UCN converter. Another focus will be the search for an EDM of the diamagnetic atom 129 Xe using a 3 He comagnetometer and SQUID detection. The HeXeEDM collaboration has taken EDM data in 2017 and 2018 in the magnetically shielded room (BMSR-2) at PTB Berlin.},
doi = {10.3390/universe5020056},
journal = {Universe},
number = 2,
volume = 5,
place = {United States},
year = {Sat Feb 09 00:00:00 EST 2019},
month = {Sat Feb 09 00:00:00 EST 2019}
}
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