Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On relation between Parton Branching Approach and CCFM evolution   We consider the associated production of electroweak gauge bosons and charm
or beauty quark jets at the LHC using the $k_T$-factorization framework. We
apply the transverse momentum dependent (TMD) parton distributions in a proton
obtained from the Parton Branching (PB) method as well as from the
Catani-Ciafaloni-Fiorani-Marchesini (CCFM) evolution equation. For the PB
approach, our prescription merges the standard leading order ${\cal O}(\alpha
\alpha_s)$ $k_T$-factorization calculations with several tree-level
next-to-leading order ${\cal O}(\alpha \alpha_s^2)$ off-shell production
amplitudes. For the CCFM scenario, our consideration is based on the ${\cal
O}(\alpha \alpha_s^2)$ off-shell gluon-gluon fusion subprocess $g^* g^* \to Z/W
+ Q\bar Q$ and some subleading ${\cal O}(\alpha \alpha_s^2)$ subprocesses
involving quark interactions, taken into account in conventional (collinear)
QCD factorization. We find that the $W + c$ and $Z + b$ cross sections,
calculated within the PB and CCFM-based schemes with the proper choice of
leading and next-to-leading subprocesses, are in good agreement with each
other, thus establishing a correspondence between these two scenarios. A
comparison with the latest LHC experimental data is given and the necessity for
the proper off-shell treatment of the production amplitudes in determination of
the parameters of the TMD parton density is demonstrated.

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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: math