an:06791945
Zbl 1372.81147
Li, Hai Tao; Skands, Peter
A framework for second-order parton showers
EN
Phys. Lett., B 771, 59-66 (2017).
0370-2693
2017
j
81T80 81V05
Parton showers; Monte Carlo event generators; QCD resummation
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.