Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: String Interactions in PP-Waves   We argue that string interactions in a PP-wave spacetime are governed by an
effective coupling $g_{eff}=g_s(\mu p^+\apm)f(\mu p^+ \apm)$ where $f(\mu p^+
\apm)$ is proportional to the light cone energy of the string states involved
in the interaction. This simply follows from generalities of a Matrix String
description of this background. $g_{eff}$ nicely interpolates between the
expected result ($g_s$) for flat space (small $\mu p^+\apm$) and a recently
conjectured expression from the perturbative gauge theory side (large $\mu
p^+\apm$).

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The categories of this paper are: nlin
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
2
The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th