Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unitarity Constraints on Semi-hard Jet Production in Impact Parameter
  Space   The perturbative QCD formula for minijet production consitutes an important
ingredient in models describing the total cross section and multiparticle
production in hadron-hadron scattering at high energies. Using arguments based
on s-channel unitarity we set bounds on the minimum value of p_T for which the
leading twist minijet formula can be used. For large impact parameters where
correlations between partons appear to be small we find that the minimum value
of p_T should be greater than 2.5 GeV for LHC energies and greater than 3.5 GeV
for cosmic ray energies of about 50 TeV. We also argue that for collisions with
values of impact parameters typical for heavy particle production the values of
minimum p_T are likely to be considerably larger. We also analyze and quantify
the potential role of saturation effects in the gluon density. We find that
although saturation effects alone are not sufficient to restore unitarity, they
are likely to play an important role at LHC energies.

21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph