Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: MHV amplitudes and BCFW recursion for Yang-Mills theory in the de Sitter
  static patch   We study the scattering problem in the static patch of de Sitter space, i.e.
the problem of field evolution between the past and future horizons of a de
Sitter observer. We formulate the problem in terms of off-shell fields in
Poincare coordinates. This is especially convenient for conformal theories,
where the static patch can be viewed as a flat causal diamond, with one tip at
the origin and the other at timelike infinity. As an important example, we
consider Yang-Mills theory at tree level. We find that static-patch scattering
for Yang-Mills is subject to BCFW-like recursion relations. These can reduce
any static-patch amplitude to one with N^{-1}MHV helicity structure, dressed by
ordinary Minkowski amplitudes. We derive all the N^{-1}MHV static-patch
amplitudes from self-dual Yang-Mills field solutions. Using the recursion
relations, we then derive from these an infinite set of MHV amplitudes, with
arbitrary number of external legs.

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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: astro-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an