Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A model for next-to-leading order threshold resummed form factors   We present a model for next-to-leading order resummed threshold form factors
based on a time-like coupling recently introduced in the framework of small x
physics. Improved expressions for the form factors in N-space are obtained
which are not plagued by Landau-pole singularities, as the included absorptive
effects -- usually neglected -- act as regulators. The physical reason is that,
because of faster decay of gluon jets, there is not enough resolution time to
observe the Landau pole. Our form factors reduce to the standard ones when the
absorptive parts related to the coupling are neglected. The inverse transform
from N-space to x-space can be done directly without any prescription and we
obtain analytical expressions for the form factors, which are well defined in
all x-space.

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The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas