Experimental tests for the Babu-Zee two-loop model of Majorana neutrino masses - INSPIRE

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Experimental tests for the Babu-Zee two-loop model of Majorana neutrino masses

D. Aristizabal Sierra
(
- Valencia U., IFIC and
- Valencia U.
)
,
M. Hirsch
(
- Valencia U., IFIC and
- Valencia U.
)

Sep, 2006

14 pages

Published in:

JHEP 12 (2006) 052

e-Print:

hep-ph/0609307 [hep-ph]

DOI:

10.1088/1126-6708/2006/12/052

Report number:

IFIC-06-31

View in:

ADS Abstract Service

reference search114 citations

Citations per year

Abstract: (arXiv)

The smallness of the observed neutrino masses might have a radiative origin. Here we revisit a specific two-loop model of neutrino mass, independently proposed by Babu and Zee. We point out that current constraints from neutrino data can be used to derive strict lower limits on the branching ratio of flavour changing charged lepton decays, such as

\mu \to e \gamma

. Non-observation of Br(

\mu \to e \gamma

) at the level of

10^{-13}

would rule out singly charged scalar masses smaller than 590 GeV (5.04 TeV) in case of normal (inverse) neutrino mass hierarchy. Conversely, decay branching ratios of the non-standard scalars of the model can be fixed by the measured neutrino angles (and mass scale). Thus, if the scalars of the model are light enough to be produced at the LHC or ILC, measuring their decay properties would serve as a direct test of the model as the origin of neutrino masses.

neutrino: Majorana
neutrino: mass
mass: hierarchy
muon: radiative decay
muon: branching ratio
lower limit
flavor: violation
neutrino: mixing angle
Feynman graph: higher-order
numerical calculations

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Figures(0)

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