Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High energy string-brane scattering for massive states   String-brane interactions provide an ideal framework to study the dynamics of
the massive states of the string spectrum in a non-trivial background. We
present here an analysis of tree-level amplitudes for processes in which an
NS-NS string state from the leading Regge trajectory scatters from a D-brane
into another state from the leading Regge trajectory, in general of a different
mass, at high energies and small scattering angles. This is done by using
world-sheet OPE methods and effective vertex operators. We find that this class
of processes has a universal dependence on the energy of the projectile and
that the tree-level amplitudes are in agreement with the eikonal operator form
of the string S-matrix.

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The categories of this paper are: math
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph