Role of lepton flavor violating muon decay in the seesaw model and LSND

Abstract

The aim of the work is to study LFV in a newly proposed Seesaw model of neutrino mass and to see whether it could explain LSND excess. The motivation of this Seesaw model was that there was no new physics beyond the TeV scale. By studying µ → 3e in this model, it is shown that the upper bound on the branching ratio requires Higgs mass m h of a new scalar doublet with lepton number L = −1 needed in the model has to be about 9 TeV. The predicted branching ratio for µ → eν lνl is too small to explain the LSND.

Atomic processes stimulated by +decay in the Mu ion

“…As follows from equation ( 4), the muon mean life τ µ differs for various compounds which contain the µ + muons. In general, however, such a difference in the µ + muon mean life is very small and cannot be determined from the results of current experiments (see [10] and references therein). Nevertheless, in this study we want to show that there are some advantages for atomic physicists to observe the µ + decay in the Mu − ions.…”

“…The most accurate value of the Fermi constant G F is (1.166 37 ± 0.000 01) × 10 −5 GeV −2 [5]. A number of sophisticated experiments have been performed to improve the overall accuracy for the G F , τ µ and some other related values (see, e.g., [6,10] and references therein). As follows from equation ( 4), the muon mean life τ µ differs for various compounds which contain the µ + muons.…”