Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Implications of String Constraints for Exotic Matter and Z' s Beyond the
  Standard Model   Global consistency of string compactifications places constraints on the
chiral matter spectrum of a gauge theory which include those necessary for the
absence of cubic nonabelian anomalies, but also contain some additional
conditions. In the class of theories we study, some of these are present in a
field theory augmented by anomalous U(1)'s and Chern-Simons terms, but some are
genuinely not present in field theory. Their violation has phenomenological
implications, rendering inconsistent many quiver gauge theories with the chiral
matter spectrum of the MSSM. The inconsistent MSSM quivers often violate the
constraints in a particular way that is suggestive of what matter must be added
for consistency. The preferred matter additions are MSSM singlets with
anomalous U(1) charge, hyperchargeless SU(2) triplets, quasichiral Higgs or
lepton isodoublet pairs, quasichiral quark isosinglet pairs, and nonabelian
singlets with charge +-1. Smaller numbers of quark isodoublet pairs, lepton
pairs with charges (+- 1,+- 2), and chiral fourth families are also found. We
present the results of systematic analyses including multiplicity counts of
matter beyond the standard model and also study the possibility of using the
singlets for a dynamical perturbative \mu-term or for neutrino mass. We also
systematically study the appearance of additional non-anomalous U(1)'
symmetries in the low energy theory and find that family non-universality is
very common. These new physics effects may be observable at the LHC even for a
large string scale close to the Planck scale.

12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci