Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
Johan AlwallSLAC, Menlo Park, USAStefan HöcheFrank KraussNils LavessonDepartment of Theoretical Physics, Lund University, Lund, SwedenLeif LönnbladDepartment of Theoretical Physics, Lund University, Lund, SwedenFabio MaltoniCentre for Particle Physics and Phenomenology (CP3), Université Catholique de Louvain, Louvain, BelgiumM. ManganoPhysics Department, CERN, 1211, Geneva 23, SwitzerlandM. MorettiDipartimento di Fisica and INFN, Ferrara, ItalyC.G. PapadopoulosInstitute of Nuclear Physics, NCSR Demokritos, Athens, GreeceF. PiccininiINFN, Pavia, ItalyS. SchumannInstitut für Theoretische Physik, TU Dresden, Dresden, GermanyM. TreccaniDipartimento di Fisica and INFN, Ferrara, ItalyJan WinterInstitut für Theoretische Physik, TU Dresden, Dresden, GermanyMałgorzata WorekITP, Karlsruhe University, Karlsruhe, Germany
2007en
ABI
Аннотация
We compare different procedures for combining fixed-order tree-level matrix-element generators with parton showers. We use the case of W-production at the Tevatron and the LHC to compare different implementations of the so-called CKKW and MLM schemes using different matrix-element generators and different parton cascades. We find that although similar results are obtained in all cases, there are important differences.
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