Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetries at ultrahigh energies and searches for neutrino oscillations   Motivated by the possibility that new (gauge) symmetries which are broken at
the grand- (string-) unification scale give rise to texture zeros in the
fermion mass matrices which are at the origin of the hierarchy of masses and
mixings we explore the effect of such zeros on the neutrino spectrum of
SUSY-GUT models. We find that the quadratic-seesaw spectrum on which most
expectations are focused is neither the only nor the most interesting
possibility. Cases of strong $\nu_{\mu} - \nu_{\tau}$ or $\nu_e - \nu_{\tau}$
mixing are present for a specific texture structure of the Yukawa matrices and
experimental evidence can thus throw some light on the latter. In contrast if
the quadratic-seesaw scenario should be confirmed very little could be said
about the symmetries of the Yukawa sector.

14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
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The categories of this paper are: stat
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int