Cutting-edge Proton EDM Storage Ring Experiment Insights

Detailed overview of the Proton EDM Storage Ring Experiment by William Morse, highlighting challenges in neutron EDM sensitivity, magic momentum phenomenon in electric fields, and advancements in proton EDM experiment sensitivity. Explore the critical parameters related to axion physics, CP-violation in the Higgs sector, and new physics reach at the 10^3 TeV mass scale. The magic momentum storage ring lattice, proton polarimetry, and symmetric storage ring design are key components for controlling systematics and improving sensitivity. Learn about the potential implications for axion dark matter searches and spin flip proportional to mass. Dive into the world of EDM theory with W. Marciano’s insightful talk.

• Proton EDM Experiment
• Neutron Sensitivity
• Axion Physics
• CP-violation
• EDM Theory

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1. Proton EDM Storage Ring Experiment William Morse February 4, 2022 W. Morse PEDM 1

2. Proton EDM Storage Ring Experiment Neutron edm experiment sensitivity has been stuck at 10 26? ??. Due to statistics, not systematics. Hard to trap neutrons. We can get 1011polarized protons from the BNL LINAC/Booster. Our requirement is 1.3 1010 polarized protons. Our proton edm experiment targeted sensitivity is 10 29? ??. W. Morse PEDM 2

3. Magic Momentum No spin precession due to MDM in electric fields 2 ? ? = Muon 3.1 GeV/c, Proton 0.7GeV/c W. Morse PEDM 3

4. Neutron edm exps are at 1026? ??. 1.E+07 1.E+06 nedm limits (10-^26ecm) 1.E+05 1.E+04 1.E+03 1.E+02 1.E+01 1.E+00 1950 1960 1970 1980 1990 2000 2010 2020 Year W. Morse PEDM 4

5. PEDM Ring - 800m circumference W. Morse PEDM 5

6. PEDM Proton edm sensitivity 10 29e cm. Improves the sensitivity to ???? by three orders of magnitude, a critical parameter related to axion physics. Combination of ARIADNE and hadronic EDM exps can exclude axions from a large frequency range; critical to axion dark matter searches. New Physics reach at 103 TeV mass scale. Probes CP-violation in the Higgs sector with best sensitivity: 30 more sensitive compared to eEDM; spin flip proportional to mass. W. Marciano Feb. 24, 2020 talk at BNL. W. Morse PEDM 6

7. W. Marciano, Overview EDM theory, https://indico.fnal.gov/event/44782/timetable/?view=nicecompact W. Morse PEDM 7

8. PEDM Highly symmetric, magic momentum storage ring lattice in order to control systematics. Proton magic momentum = 0.7 GeV/c. Proton polarimetry peak sensitivity at the magic momentum. Electric bending, magnetic focusing is optimal. Stores simultaneously CW and CCW bunches. Stores simultaneously longitudinally and radially polarized bunches. 24-fold symmetric storage ring. Alternating focusing and de-focusing elements fill to fill. GeV c. Muon magic momentum = 3.1 W. Morse PEDM 8

9. Polarimeter W. Morse PEDM 9

10. Polarimetry E=233 MeV W. Morse PEDM 10

11. ?? ?? = ? ? PEDM Circumference = 800m. ? = 4.4 MV m. Conservative electric field. Sensitive to vector dark matter/dark energy models [1]. VDM/DE signal proportional to ? = PEDM experiment is highly complementary with molecule edm experiments [2]. Molecule edm: many different effects, sole source analysis , unknown cancellations [3]. After proton edm, add magnetic bending and do Deuteron/He3 edm measurements. Deuteron and He3 edm measurements have complementary physics to proton edm. ? ?. Magic momentum pEDM ring ? = 0.6. W. Morse PEDM 11

12. ?? ?? = ? ? FNAL Need polarized source and space for the ring. We have talked with FNAL AD. Valeri Lededev BD. Want high E (sensitivity) and low circumference (cost). Electrodes 20cm high, 4cm separation. In AGS tunnel at magic energy: E = 4.4MV/m. Riad Suleiman, JLab: Up to 5MV/m, doesn t need R&D. W. Morse PEDM 12

13. BD 13 W. Morse PEDM

14. PEDM 1. P.W. Graham et al., Storage ring Probes for Dark Matter and Dark Energy, PRD103, 055010, 2021. 2. N. Hutzler, Developing New Directions in Fundamental Physics 2020, 4-6 Nov. 2020. 3. T. Chupp, Developing New Directions in Fundamental Physics 2020, 4-6 Nov. 2020; T. Chupp et al., Rev. Mod. Phys. 91, 015001 (2019). W. Morse PEDM 14

15. References 1. F.J.M. Farley et al., A new method of measuring electric dipole moments in storage rings, Phys. Rev. Lett. 93, 052001 (2004) 2. G.W. Bennett et al., An improved limit on the muon electric dipole moment, Phys. Rev. D 80, 052008 (2009) 3. N.P.M. Brantjes et al., Correction systematic errors in high-sensitivity deuteron polarization measurements, Nucl. Instrum. Meth. A664, 49 (2012) 4. W.M. Morse et al.,rf Wien filter in an electric dipole moment storage ring: The partially frozen spin effect, Phys. Rev. Accel. Beams 16 (11), 114001 (2013) 5. E.M. Metodiev et al., Fringe electric fields of flat and cylindrical deflectors in electrostatic charged particle storage rings, Phys. Rev. Accel. Beams 17 (7), 074002 (2014) 6. E.M. Metodiev et al., Analytical benchmarks for precision particle tracking in electric and magnetic rings, NIM A797, 311 (2015) 7. V. Anastassopoulos et al., A storage ring experiment to detect a proton electric dipole moment, Rev. Sci. Instrum. 87 (11), 115116 (2016) 8. G. Guidoboni et al., How to reach a Thousand-second in-plane Polarization Lifetime with 0.97 GeV/c Deuterons in a storage ring, Phys. Rev. Lett. 117 (5), 054801 (2016) 9. N. Hempelmann et al., Phase locking the spin precession in a storage ring, Phys. Rev. Lett. 119 (1), 014801 (2017) W. Morse PEDM 15

16. References 1. S. Haciomeroglu et al., SQUID-based Beam Position Monitor, PoS ICHEP2018 (2019) 279 2. S.P. Chang et al., Axionlike dark matter search using the storage ring EDM method, Phys. Rev. D 99 (8), 083002 (2019) 3. S. Haciomeroglu and Y.K. Semertzidis, Hybrid ring design in the storage-ring proton EDM experiment, Phys. Rev. Accel. Beams 22 (3), 034001 (2019) 4. P.W. Graham et al., Storage ring Probes for Dark Matter and Dark Energy, Phys.Rev. D 103 (2021) 5, 055010 5. Z. Omarov et al., Comprehensive Symmetric-Hybrid ring design for pEDM experiment at below 10-29e-cm, arXiv:2007.10332 (2020) 6. On Kim, Yannis K. Semertzidis, New method of probing an oscillating EDM induced by axionlike dark matter using an rf Wien filter in storage rings, Phys. Rev. D 104, 096006 (2021), DOI: 10.1103/PhysRevD.104.096006 W. Morse PEDM 16