Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High Energy String Collisions in a Compact Space   When high energy strings scatter at fixed angle, their amplitudes
characteristically fall off exponentially with energy, ${\cal A} \sim \exp(-s
\times const.)$. We show that in a compact space this suppression disappears
for certain kinematic configurations. Amplitudes are power-law behaved and
therefore greatly enhanced. In spacetime this corresponds to fixed-angle
scattering, with fixed transfer in the compact dimensions. On the worldsheet
this process is described by a stationary configuration of effective charges
and vortices with vanishing total energy. It is worldsheet duality---and not
spacetime duality---that plays a role.

31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
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The categories of this paper are: stat
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat