Proposal to measure the muon electric dipole moment with a compact storage ring

by Prof. Klaus Kirch (Paul Scherrer Institut, Villigen (CH))

Thursday 22 Nov 2007, 16:15 → 17:45 Europe/Brussels

E. 349 (FYNU)

In the Standard Model of particle physics lepton electric dipole moments (EDM) are many orders of magnitude below the sensitivity of current and future experiments. Lepton EDMs therefore offer an excellent opportunity to discover unambiguous evidence for new CP-violating phases, as called for by the baryon-antibaryon asymmetry of the universe. The muon EDM is one of the least constrained fundamental properties in elementary particle physics. We propose to utilize the large available flux of polarized muons at PSI to search for a muon EDM down to the level of $5\times10^{-23}e$ cm, about four orders of magnitude below the current limit. The experiment consists of a very compact storage ring (42 cm radius), in which a radial electric field compensates the g-2 precession, thereby greatly enhancing the sensitivity to a possible EDM-induced spin precession.

Slides Louvain07_kirch_muEDM.pdf