Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced Electromagnetic Transition Dipole Moments and Radiative Decays
  of Massive Neutrinos due to the Seesaw-induced Non-unitary Effects   In a simple extension of the standard electroweak theory where the phenomenon
of lepton flavor mixing is described by a 3x3 unitary matrix V, the electric
and magnetic dipole moments of three active neutrinos are suppressed not only
by their tiny masses but also by the Glashow-Iliopoulos-Maiani (GIM) mechanism.
We show that it is possible to lift the GIM suppression if the canonical seesaw
mechanism of neutrino mass generation, which allows V to be slightly
non-unitary, is taken into account. In view of current experimental constraints
on the non-unitarity of V, we find that the effective electromagnetic
transition dipole moments of three light Majorana neutrinos and the rates of
their radiative decays can be maximally enhanced by a factor of O(10^2) and a
factor of O(10^4), respectively. This important observation reveals an
intrinsic and presumably significant correlation between the electromagnetic
properties of massive neutrinos and the origin of their small masses.

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The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
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The categories of this paper are: eess
26
The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org