Upper limits on the decay D0-->μ+μ- and on D0-D¯0 mixing
Abstract
As a by-product to the study of muon pairs produced by 255-GeV/c pions, data from Fermilab yield upper limits on the decay D0-->μ+μ- and on D0-D¯0 mixing. An unrestricted sample of 122 630 unlike-sign muon pairs allows a 90%-C.L. (confidence level) upper limit of 1.1×10-5 to be placed on the branching ratio of the charm-changing neutral-current decay D0-->μ+μ-. From a sample of 3973 like-sign muon pairs, the ratio r=Γ(D¯0-->μ+X)/Γ(D¯0-->μ -x) is determined to be r<5.6×10-3 at 90% C.L.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 1986
- DOI:
- 10.1103/PhysRevLett.56.1027
- Bibcode:
- 1986PhRvL..56.1027L
- Keywords:
-
- 13.20.Jf;
- 13.85.Qk;
- 14.40.Jz;
- Decays of other mesons;
- Inclusive production with identified leptons photons or other nonhadronic particles