A framework for second-order parton showers
A framework is presented for including second-order perturbative corrections to the radiation patterns of parton showers. The formalism allows to combine O(αs2)-corrected iterated 2→3 kernels for “ordered” gluon emissions with tree-level 2→4 kernels for “unordered” ones. The combined Sudakov evoluti...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-08-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317303684 |
| Summary: | A framework is presented for including second-order perturbative corrections to the radiation patterns of parton showers. The formalism allows to combine O(αs2)-corrected iterated 2→3 kernels for “ordered” gluon emissions with tree-level 2→4 kernels for “unordered” ones. The combined Sudakov evolution kernel is thus accurate to O(αs2). As a first step towards a full-fledged implementation of these ideas, we develop an explicit implementation of 2→4 shower branchings in this letter. Keywords: Parton showers, Monte Carlo event generators, QCD resummation |
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| ISSN: | 0370-2693 |