Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resolving the A_{FB}^b puzzle in an extra dimensional model with an
  extended gauge structure   It is notorious that, contrary to all other precision electroweak data, the
forward-backward asymmetry for b quarks $A_{FB}^b$ measured in Z decays at LEP1
is nearly three standard deviations away from the predicted value in the
Standard Model; significant deviations also occur in measurements of the
asymmetry off the Z pole. We show that these discrepancies can be resolved in a
variant of the Randall-Sundrum extra-dimensional model in which the gauge
structure is extended to $SU(2)_L \times SU(2)_R \times U(1)_X$ to allow for
relatively light Kaluza-Klein excitations of the gauge bosons. In this
scenario, the fermions are localized differently along the extra dimension, in
order to generate the fermion mass hierarchies, so that the electroweak
interactions for the heavy third generation fermions are naturally different
from the light fermion ones. We show that the mixing between the Z boson with
the Kaluza-Klein excitations allows to explain the $A_{FB}^b$ anomaly without
affecting (and even improving) the agreement of the other precision
observables, including the $Z \to bb$ partial decay width, with experimental
data. Some implications of this scenario for the ILC are summarized.

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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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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: nlin
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess