New limits on the electric dipole moment of positive and negative muons

New measurements of the electric dipole moment muons of both charges have been made in the Muon Storage Ring at CERN. The values found are Dmu +=(8.6+or-4.5)*10-19 e cm Dmu -=(0.8+or-4.3)*10-19 e cm (errors are of one standard deviation). It is concluded, at 95% confidence level, that mod Dmu mod <or=1.05*10-18 e cm.