Analysis Centre Seminar: Naohito Saito (KEK / J-PARC): New Measurements of Muon g-2 and EDM with an Ultra-Cold Muon Beam at J-PARC

Friday 7 Oct 2011, 10:00 → 11:30 Europe/Berlin

SR 1 (DESY Hamburg)

We have proposed a new measurement of the muon anomalous magnetic moment and electric dipole moment at J-PARC. The new measurement utilizes a ultra-cold muon beam. The transverse dispersion of the beam is much less than its longitudinal momentum, i.e. ΔpT/pL ~ 10-5. Such a muon beam can be stored in a static magnetic field with an effectively-zero focusing field. With this technique, the storage field can be much smaller than in previous experiments. The proposed experiment will employ a 3 T high precision field to store a 300 MeV/c muon beam in the circular orbit of 33 cm in radius. Such small dimensions would be beneficial in the precision control as well as for the geometrical acceptance of the decay positron detector. Our first goal is to improve the precision of muon g-2 down to 0.1 ppm, which is a factor of 5 improvement, and the search for the permanent electric dipole moment at the level of 1e-21 e cm, which is a two orders of magnitudes better sensitivity compared to the last measurement. Further improvements of both g-2 and EDM are also possible with future extensions. We discuss the current status and the future potential of the project. EVO connections: Title: Analysis Centre Seminars Description: Analysis Centre Seminars Community: Terascale Phone Bridge ID: 1312410 Meeting URL: http://evo.vrvs.org/evoGate/koala.jnlp?meeting=MaMDMt222sDeDi9M98DI9a