Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective String Amplitudes for Hadronic Physics   We propose using the general structure and properties of conformal field
theory amplitudes, in particular those defined on surfaces with boundaries, to
explore effective string theory amplitudes for some hadronic processes. Two
examples are considered to illustrate the approach. In one a natural mechanism
for chiral symmetry breaking within the string picture is proposed. One
consequence is that the vertex operator for pion emission (at zero momentum)
behaves like a world sheet current evaluated on the string boundary. This fact
is used to rederive, in a more general setting, hadronic mass relations found
in the early days of string theory by Lovelace, and Ademollo, Veneziano and
Weinberg. In the second example, we derive the general structure of the form
factor for the emission of a pomeron (interpreted as a closed string) from a
meson or baryon. The result reconciles the interpretation of the pomeron as a
closed string, emitted from the interior of the meson or baryon world sheet,
with the additive quark rules for total hadronic cross sections. We also review
the difficulties involved in constructing complete effective string theories
for hadrons, and comment on the relation between the intercepts of trajectories
and the short distance behavior of the underlying theory.

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The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph