Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Acausality from a Dark Sector   Solutions to the hierarchy problem that require partners for each standard
model particle often require that these states live at or above the electroweak
scale, to satisfy phenomenological bounds. Partners to possible dark sector
particles may be significantly lighter, due to the assumed weakness of the
couplings between the dark and visible sectors. Here we consider the
possibility that a dark sector might include light Lee-Wick particles. We
present the formulation of a theory in which a dark photon and its Lee-Wick
partner have kinetic mixing with hypercharge. We point out that the Lee-Wick
partner of the dark photon will lead to an apparent violation of causality at
small distance scales that might be discerned in low-energy experiments.

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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
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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: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat