Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts

Kuchler, Florian

doi:10.3390/universe5020056

Title: Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts

Journal Article · Sat Feb 09 00:00:00 EST 2019 · Universe

DOI:https://doi.org/10.3390/universe5020056· OSTI ID:1609531

^[1]

TRIUMF, Vancouver, BC (Canada)

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.

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Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: TUCAN Collaboration; HeXeEDM Collaboration

Grant/Contract Number:: FG02-04ER41331

OSTI ID:: 1609531

Journal Information:: Universe, Vol. 5, Issue 2; Conference: 7. International Conference on New Frontiers in Physics (ICNFP 2018), Crete (Greece), 4-12 Jul 2018; ISSN 2218-1997

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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Title: Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts

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