Limit on the electric charge-nonconserving $μ^+ \to invisible$ decay

Details Limit on the electric charge-nonconserving $μ^+ \to invisible$ decay Limit on the electric charge-nonconserving $μ^+ \to invisible$ decay

2007-07-24

arxiv.org/abs/0707.3492v1

Phys.Rev.D76:055004,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 2 Figure, to appear in PRD

Scientific paper

10.1103/PhysRevD.76.055004

The first limit on the branching ratio of the electric charge-nonconserving invisible muon decay $Br(\mu^+ \to invisible) < 5.2 \times 10^{-3}$ is obtained from the recently reported results on new determination of the Fermi constant from muon decays. The results of a feasibility study of a new proposed experiment for a sensitive search for this decay mode at the level of a few parts in 10^{11} are presented. Constrains on the $\tau \to invisible$ decay rate are discussed. These leptonic charge-nonconserving processes may hold in four-dimensional world in models with infinite extra dimensions, thus making their searches complementary to collider experiments probing new physics.

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