11-15 September 2023
Budker INP
Asia/Novosibirsk timezone

Quasi-frozen structures at NICA as pathways to search for the electric dipole moment of deuterons and axion dark matter

13 Sep 2023, 10:00
Conference Hall (Budker INP)

Conference Hall

Budker INP

Lavrentiev av. 11, Novosibirsk 630090 Russia
Oral High intensity circular and linear accelerators Heavy Ions Accelerators


Alexander Aksentev (INR of RAS)


The original program of the NICA accelerator complex focused on a heavy ion and polarized deuteron and proton collider physics and did not include precision searches for the electric dipole moments (EDM) and the galactic axion condensate. The usually discussed CPEDM and srEDM approaches to the search for the EDM of protons only envision the dedicated ring operated at a special energy corresponding to the "frozen spin" mode with spin pointing along the momentum.

Taking advantage of the smallness of the magnetic anomaly of deuterons, we propose to operate NICA ring in the "quasi-frozen spin" mode, when the precession away of momentum of spin in arcs is compensated by Wien filters in straight sections. The simplest technical solution is a bypass along the straight sections of the collider endowed with Wien filters, allowing to search for the deuteron EDM without affecting any infrastructure of the MPD and SPD detectors.

Simultaneously, modulation of the spin precession by Wien filters in bypasses will make NICA a broadband axion antenna. The new role of the bypass as an axion antenna, in addition to searching for the EDM of protons and deuterons, significantly increases the potential of the NICA complex as a unique platform for precision tests of fundamental symmetries in particle physics. The report discusses the main problems of the frequency domain method for measuring the EDM in the quasi-frozen spin regime applied to NICA.

Primary authors

Dr Yury Senichev (INR RAS) Dr Nikolay Nikolaev (Landau ITP)


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