Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Fermion Mass Problem and the Anti-Grand Unification Model   We describe the Anti-Grand Unification Model (AGUT) and the Multiple Point
Principle (MPP) used to calculate the values of the Standard Model gauge
coupling constants in the theory, from the requirement of the existence of
degenerate vacua. The application of the MPP to the pure Standard Model
predicts the existence of a second minimum of the Higgs potential close to the
cut-off, which we take to be the Planck scale, giving our Standard Model
predictions for the top quark and Higgs masses: $M_t = 173 \pm 5$ GeV and $M_H
= 135 \pm 9$ GeV. We also discuss mass protection by chiral charges and present
a fit to the charged fermion mass spectrum using the chiral quantum numbers of
the maximal AGUT gauge group $SMG^3 \times U(1)_f$, where $SMG \equiv SU(3)
\times SU(2) \times U(1)$. The neutrino mass and mixing problem is then briefly
discussed for models with chiral flavour charges responsible for the charged
fermion mass hierarchy.

21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin