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nam
2016-05-02 13:08:13 +09:00
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10
thesis/chapters/chap2_mu_e_conv.tex
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@@ -250,7 +250,7 @@ flavour was experimentally verified in the Nobel Prize-winning experiment of
Danby et al. at Brookhaven National Laboratory
(BNL)~\cite{DanbyGaillard.etal.1962}. Then the concepts of generations of
particles was developed~\cite{MakiNakagawa.etal.1962}, and integrated into the
SM, in which the lepton flavour conservation is guaranteed by and exact
SM, in which the lepton flavour conservation is guaranteed by an exact
symmetry, owing to massless neutrinos.
Following the above LFV searches with muons, searches with various particles,
@@ -267,11 +267,11 @@ must be modified to accommodate the massive neutrinos.
With the massive neutrinos charged lepton flavour violation (CLFV) must occur
through oscillations in loops. But, CLFV processes are highly suppressed in the
SM.
For example, Marciano and Mori ~\cite{MarcianoMori.etal.2008} calculated the
%\hl{TODO: Feynman diagram}
For example, Marciano and Mori~\cite{MarcianoMori.etal.2008} calculated the
branching ratio of the process \mueg to be \brmeg$<10^{-54}$. Other
CLFV processes with muons are also suppressed to similar practically
unmeasurable levels.%\hl{TODO: Feynman diagram}
Therefore, any experimental
unmeasurable levels. Therefore, any experimental
observation of CLFV would be an unambiguous signal of the physics beyond the
SM. Many theoretical models for physics beyond the SM, including supersymmetric
(SUSY) models, extra dimensional models, little Higgs models, predict
@@ -308,7 +308,7 @@ significantly larger CLFV
%It is calculated that there are two CLFV processes that would
%occur at large rates by many new physics models,
Among the CLFV processes, the \mueg and
the \muec are expected to have large effect by many models. The current
the \muec are expected to have large effect in many models. The current
experimental limits on these two decay modes are set respectively by the MEG
experiment~\cite{Adam.etal.2013} and the SINDRUM-II
experiment~\cite{Bertl.etal.2006}: