Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of the fine-structure constant in runaway dilaton models   We study the detailed evolution of the fine-structure constant $\alpha$ in
the string-inspired runaway dilaton class of models of Damour, Piazza and
Veneziano. We provide constraints on this scenario using the most recent
$\alpha$ measurements and discuss ways to distinguish it from alternative
models for varying $\alpha$. For model parameters which saturate bounds from
current observations, the redshift drift signal can differ considerably from
that of the canonical $\Lambda$CDM paradigm at high redshifts. Measurements of
this signal by the forthcoming European Extremely Large Telescope (E-ELT),
together with more sensitive $\alpha$ measurements, will thus dramatically
constrain these scenarios.

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The categories of this paper are: physics
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The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: math
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: eess