Journal Article

FZJ-2023-01433

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Precision Storage Rings for Electric Dipole Moment Searches: A Tool En Route to Physics Beyond-the-Standard-Model

Ströher, H. (Corresponding author)FZJ* ; Schmidt, S. M. ; Lenisa, P. ; Pretz, J.FZJ*

2023
MDPI AG Basel

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Please use a persistent id in citations: http://hdl.handle.net/2128/34097  doi:10.3390/particles6010020

Abstract: Electric Dipole Moments (EDM) of particles (leptons, nucleons, and light nuclei) are currently deemed one of the best indicators for new physics, i.e., phenomena which lie outside the Standard Model (SM) of elementary particle physics—so-called physics “Beyond-the-Standard-Model” (BSM). Since EDMs of the SM are vanishingly small, a finite permanent EDM would indicate charge-parity (CP) symmetry violation in addition to the well-known sources of the SM, and could explain the baryon asymmetry of the Universe, while an oscillating EDM would hint at a possible Dark Matter (DM) field comprising axions or axion-like particles (ALPs). A new approach exploiting polarized charged particles (proton, deuteron, 3He) in precision storage rings offers the prospect to push current experimental EDM upper limits significantly further, including the possibility of an EDM discovery. In this paper, we describe the scientific background and the steps towards the realization of a precision storage ring, which will make such measurements possible.

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Contributing Institute(s):

1. Experimentelle Hadrondynamik (IKP-2)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)

Appears in the scientific report 2023

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