GenEvA (I): A new framework for event generation

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dc.creatorBauer, Christian W.
dc.creatorTackmann, Frank J.
dc.creatorThaler, Jesse
dc.date2008-01-28
dc.date2008-09-05
dc.date.accessioned2026-07-07T13:12:23Z
dc.date.available2026-07-07T13:12:23Z
dc.descriptionWe show how many contemporary issues in event generation can be recast in terms of partonic calculations with a matching scale. This framework is called GenEvA, and a key ingredient is a new notion of phase space which avoids the problem of phase space double-counting by construction and includes a built-in definition of a matching scale. This matching scale can be used to smoothly merge any partonic calculation with a parton shower. The best partonic calculation for a given region of phase space can be determined through physics considerations alone, independent of the algorithmic details of the merging. As an explicit example, we construct a positive-weight partonic calculation for e+e- -> n jets at next-to-leading order (NLO) with leading-logarithmic (LL) resummation. We improve on the NLO/LL result by adding additional higher-multiplicity tree-level (LO) calculations to obtain a merged NLO/LO/LL result. These results are implemented using a new phase space generator introduced in a companion paper [arXiv:0801.4028].
dc.description60 pages, 22 figures, v2: corrected typos, added references
dc.identifierhttps://arxiv.org/abs/0801.4026
dc.identifierhttp://arxiv.org/abs/0801.4026
dc.identifierJHEP 0812:010,2008
dc.identifierdoi:10.1088/1126-6708/2008/12/010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229564
dc.subjectHigh Energy Physics - Phenomenology
dc.titleGenEvA (I): A new framework for event generation
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