Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Study of the Energy Dependence of the Underlying Event in
  Proton-Antiproton Collisions   We study charged particle production in proton-antiproton collisions at 300
GeV, 900 GeV, and 1.96 TeV. We use the direction of the charged particle with
the largest transverse momentum in each event to define three regions of
eta-phi space; toward, away, and transverse. The average number and the average
scalar pT sum of charged particles in the transverse region are sensitive to
the modeling of the underlying event. The transverse region is divided into a
MAX and MIN transverse region, which helps separate the hard component (initial
and final-state radiation) from the beam-beam remnant and multiple parton
interaction components of the scattering. The center-of-mass energy dependence
of the various components of the event are studied in detail. The data
presented here can be used to constrain and improve QCD Monte Carlo models,
resulting in more precise predictions at the LHC energies of 13 and 14 TeV.

11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat