Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Helicity-1/2 Mode as a Probe of Interactions of Massive Rarita-Schwinger
  Field   We consider the electromagnetic and gravitational interactions of a massive
Rarita-Schwinger field. Stueckelberg analysis of the system, when coupled to
electromagnetism in flat space or to gravity, reveals in either case that the
effective field theory has a model-independent upper bound on its UV cutoff,
which is finite but parametrically larger than the particle's mass. It is the
helicity-1/2 mode that becomes strongly coupled at the cutoff scale. If the
interactions are inconsistent, the same mode becomes a telltale sign of
pathologies. Alternatively, consistent interactions are those that propagate
this mode within the light cone. Studying its dynamics not only sheds light on
the Velo-Zwanziger acausality, but also elucidates why supergravity and other
known consistent models are pathology-free.

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The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: math