Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twistor-Inspired Construction of Electroweak Vector Boson Currents   We present an extension of the twistor-motivated MHV vertices and
accompanying rules presented by Cachazo, Svrvcek and Witten to the construction
of vector-boson currents coupling to an arbitrary source. In particular, we
give rules for constructing off-shell vector-boson currents with one fermion
pair and n gluons of arbitrary helicity. These currents may be employed
directly in the computation of electroweak amplitudes. The rules yield
expressions in agreement with previously-obtained results for Z,W,\gamma^* -->
qbar q + n gluons (analytically up to n=3, beyond via the Berends--Giele
recursion relations). We also confirm that the contribution to a seven-point
amplitude containing the non-abelian triple vector-boson coupling obtained
using the next-to-MHV currents matches the previous result in the literature.

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The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin