Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Explaining the ttbar Forward-Backward Asymmetry from a GUT-Inspired
  Model   We consider a model that includes light colored scalars from the {\bf 45} and
{\bf 50} representations of SU(5) in order to explain the CDF- and
D$\O$-reported $t\bar{t}$ forward-backward asymmetry, $A^{t\bar{t}}_{FB}$.
These light scalars are, labeled by their charges under the Standard Model
gauge groups, the $(6,1)_{4/3}$ and $(\bar{6},3)_{1/3}$ from the {\bf 50} and
the $(8,2)_{1/2}$ from the {\bf 45}. When the Yukawa coupling of the {\bf 50}
is reasonably chosen and that of the {\bf 45} kept negligible at the scale of
$M_Z$, the model yields phenomenologically viable results in agreement with the
total $A^{t\bar{t}}_{FB}$ reported by CDF at the 0.7$\sigma$ level and with
$A^{t\bar{t}}_{FB} (M_{t\bar{t}} \ge 450 \text{GeV})$ at the 2.2$\sigma$ level.
Additionally, the Yukawa coupling of the {\bf 50} remains perturbative to the
GUT scale (which defines a "reasonably chosen" value at $M_Z$), and the
presence of the light scalar from the {\bf 45} allows for gauge coupling
unification at a scale of $M_{GUT} \sim 10^{17}$ GeV.

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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
3
The categories of this paper are: physics
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
2
The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: cond-mat