Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Model of Lepton Masses from a Warped Extra Dimension   In order to explain the non-hierarchical neutrino mixing angles and the
absence of lepton flavor violating processes in the context of warped extra
dimensions one needs to introduce bulk flavor symmetries. We present a simple
model of lepton masses and mixings in RS models based on the A4 non-abelian
discrete symmetry. The virtues of this choice are: (i) the natural appearance
of the tri-bimaximal mixing pattern; (ii) the complete absence of tree-level
flavor violations in the neutral sector; (iii) the absence of flavor gauge
bosons; (iv) the hierarchies in the charged lepton masses are explained via
wave-function overlaps. We present the minimal field content and symmetry
breaking pattern necessary to obtain a successful model of this type. The
bounds from electroweak precision measurements allow the KK mass scale to be as
low as 3 TeV. Tree-level lepton flavor violation is absent in this model, while
the loop induced mu -> e gamma branching fraction is safely below the
experimental bound.

17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an