Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenomenological Survey of a Minimal Superstring Standard Model   We discuss a heterotic-string solution in which the observable sector
effective field theory just below the string scale reduces to that of the MSSM,
with the standard observable gauge group being just SU(3)_C x SU(2)_L x U(1)_Y
and the SU(3)_C x SU(2)_L x U(1)_Y-charged spectrum of the observable sector
consisting solely of the MSSM spectrum. Associated with this model is a set of
distinct flat directions of vacuum expectation values (VEVs) of fields that all
produce solely the MSSM spectrum. Some of these directions only involve VEVs of
non-Abelian singlet fields while others also contain VEVs of non-Abelian
charged fields.

9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn