Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unintegrated parton distributions and electroweak boson production at
  hadron colliders   We describe the use of doubly-unintegrated parton distributions in
hadron-hadron collisions, using the (z,k_t)-factorisation prescription where
the transverse momentum of the incoming parton is generated in the last
evolution step. We apply this formalism to calculate the transverse momentum
(P_T) distributions of produced W and Z bosons and compare the predictions to
Tevatron Run 1 data. We find that the observed P_T distributions can be
generated almost entirely by the leading order q_1 q_2 -> W,Z subprocesses,
using known and universal doubly-unintegrated quark distributions. We also
calculate the P_T distribution of the Standard Model Higgs boson at the LHC,
where the dominant production mechanism is by gluon-gluon fusion.

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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
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The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
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The categories of this paper are: bayes-an
3
The categories of this paper are: physics
16
The categories of this paper are: stat
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The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex