Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ambitwistor String Theory in the Operator Formalism   After a brief overview of the operator formalism for conventional string
theory, an operator formalism for ambitwistor string theory is presented. It is
shown how tree level supergravity scattering amplitudes are recovered in this
formalism. More general applications of this formalism to loop amplitudes and
the construction of an ambitwistor string field theory are briefly discussed.

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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph