Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On gravitational couplings in D-brane action   We compute the two closed string graviton - two open string scalar scattering
amplitude on the disc to show that there is no second-derivative curvature -
scalar coupling term R X^2 in the low-energy effective action of a D-brane in
curved space in type II superstring theory.

29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol