Precision Storage Rings for Electric Dipole Moment Searches: A Tool En Route to Physics Beyond-the-Standard-Model

Particles

article

Hans Ströher¹  Sebastian M. Schmidt²  Paolo Lenisa⁴  Jörg Pretz¹ 

[1] Forschungszentrum Jülich;Helmholtz-Zentrum Dresden-Rossendorf;Rheinisch-Westfälische Technische Hochschule;Istituto Nazionale di Fisica Nucleare ,(INFN), University of Ferrara

关键词: Baryon asymmetry;    dark matter;    electric dipole moments;    storage rings;    polarized beams;   

DOI  :  10.3390/particles6010020

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY