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A framework for second-order parton showers. (English) Zbl 1372.81147
Summary: A framework is presented for including second-order perturbative corrections to the radiation patterns of parton showers. The formalism allows to combine \(\mathcal{O}(\alpha_s^2)\)-corrected iterated \(2 \rightarrow 3\) kernels for “ordered” gluon emissions with tree-level \(2 \rightarrow 4\) kernels for “unordered” ones. The combined Sudakov evolution kernel is thus accurate to \(\mathcal{O}(\alpha_s^2)\). As a first step towards a full-fledged implementation of these ideas, we develop an explicit implementation of \(2 \rightarrow 4\) shower branchings in this letter.
MSC:
81T80 Simulation and numerical modelling (quantum field theory) (MSC2010)
81V05 Strong interaction, including quantum chromodynamics
Software:
ARIADNE; PYTHIA8
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References:
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