Abstract
To search for spontaneous conversion of muonium to antimuonium with very low background, a new signature was implemented that required the coincident detection of the decay products of the antimuonium atom, the energetic and the atomic . No conversion events were seen, which sets an improved upper limit of 6.5× (90% C.L.) on the conversion probability. The corresponding limit on the coupling constant, using a V-A form for the conversion Hamiltonian, is <0.16 (90% C.L.), where is the Fermi coupling constant.
- Received 7 March 1991
DOI:https://doi.org/10.1103/PhysRevLett.66.2716
©1991 American Physical Society