Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The leading eikonal operator in string-brane scattering at high energy   In this paper we present two (a priori independent) derivations of the
eikonal operator in string-brane scattering. The first one is obtained by
summing surfaces with any number of boundaries, while in the second one the
eikonal operator is derived from the three-string vertex in a suitable
light-cone gauge. This second derivation shows that the bosonic oscillators
present in the leading eikonal operator are to be identified with the string
bosonic oscillators in a suitable light-cone gauge, while the first one shows
that it exponentiates recovering unitarity. This paper is a review of results
obtained in two previous publications of the same authors.

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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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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: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph