Search for a muon EDM using the frozen-spin technique

Abstract

This letter of intent proposes an experiment to search for an electric dipole moment of the muon based on the frozen-spin technique. We intend to exploit the high electric field, $E=1GV/m$, experienced in the rest frame of the muon with a momentum of $p=125MeV/c$ when passing through a large magnetic field of $|\vec{B}|=3\mathrm{T}$. Current muon fluxes at the $\mu$E1 beam line permit an improved search with a sensitivity of $\sigma (d_{\mu })\le 6\times 10^{-23}e\mathrm{cm}$, about three orders of magnitude more sensitivity than for the current upper limit of $|d_{\mu }|\le 1.8\times 10^{-19}e\mathrm{cm}$\,(C.L. 95\%). With the advent of the new high intensity muon beam, HIMB, and the cold muon source, muCool, at PSI the sensitivity of the search could be further improved by tailoring a re-acceleration scheme to match the experiments injection phase space. While a null result would set a significantly improved upper limit on an otherwise un-constrained Wilson coefficient, the discovery of a muon EDM would corroborate the existence of physics beyond the Standard Model.

arXiv commentBased on the letter of intent submitted to the PSI CHRISP research committee in January 021 28 pages, 25 figures

References in corpus (8)

• Recent Progress in Baryogenesis
• Standard Model CP-violation and Baryon asymmetry
• Electroweak Baryogenesis and Standard Model CP Violation
• Differential branching fractions and isospin asymmetries of $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ decays
• Angular analysis of the decay B0 to K*0 mu mu from pp collisions at sqrt(s) = 8 TeV
• A Flavor Symmetry for quasi-degenerate Neutrinos: L_mu-L_tau
• Bottom-up model for maximal ${\nu }_{\mu }-{\nu }_{\tau }$ mixing
• Highlights and Perspectives from the CMS Experiment

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• Science Case for the new High-Intensity Muon Beams HIMB at PSI
• Improved indirect limits on charm and bottom quark EDMs
• Reevaluation of heavy-fermion-induced electron EDM at three loops
• Muon Electric Dipole Moment as a Probe of Flavor-Diagonal CP Violation
• Predicting outcomes of electric dipole and magnetic moment experiments
• Operating the GridPix detector with helium-isobutane gas mixtures for a high-precision, low-mass Time Projection Chamber
• Phase space compression of a positive muon beam in two spatial dimensions