Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hidden photons with Kaluza-Klein towers   One of the simplest extensions of the Standard Model (SM) is an extra U(1)
gauge group under which SM matter does not carry any charge. The associated
boson -- the hidden photon -- then interacts via kinetic mixing with the
ordinary photon. Such hidden photons arise naturally in UV extensions such as
string theory, often accompanied by the presence of extra spatial dimensions.
In this note we investigate a toy scenario where the hidden photon extends into
these extra dimensions. Interaction via kinetic mixing is observable only if
the hidden photon is massive. In four dimensions this mass needs to be
generated via a Higgs or Stueckelberg mechanism. However, in a situation with
compactified extra dimensions there automatically exist massive Kaluza-Klein
modes which make the interaction observable. We present phenomenological
constraints for our toy model. This example demonstrates that the additional
particles arising in a more complete theory can have significant effects on the
phenomenology.

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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol