Limit on the electric charge-nonconserving ${\mu }^{+}\to invisible$ decay

Abstract

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.

5 pages, 2 Figure, to appear in PRD

References in corpus (15)

• An Alternative to Compactification
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Large and infinite extra dimensions
• Updated Bounds on Milli-Charged Particles
• Brane world: disappearing massive matter
• Polarized Light Propagating in a Magnetic Field as a Probe of Millicharged Fermions
• An Improved Limit on Invisible Decays of Positronium
• Narrowing the window for millicharged particles by CMB anisotropy
• Fermi Constants and ``New Physics''
• Localized U(1) Gauge Fields, Millicharged Particles, and Holography
• Is the electric charge conserved in brane world?
• Search for millicharged particles in reactor neutrino experiments: a probe of the PVLAS anomaly
• Extra dimensions and invisible decay of orthopositronium
• Possible electric charge nonconservation and dequantization in $SU(2)\times U(1)$ models with hard symmetry breaking

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• The LSND/MiniBooNe excess events and heavy neutrino from muon and kaon decays
• Invisible decay of muonium: Tests of the standard model and searches for new physics
• Fundamental measurements with muons - View from PSI