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Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions

2007; Springer Science+Business Media; Volume: 53; Issue: 3 Linguagem: Inglês

10.1140/epjc/s10052-007-0490-5

1434-6052

Johan Alwall, Stefan Höche, Frank Krauss, Nils Lavesson, Leif Lönnblad, Fabio Maltoni, M. Mangano, M. Moretti, C.G. Papadopoulos, F. Piccinini, S. Schumann, M. Treccani, Jan Winter, Małgorzata Worek,

Quantum Chromodynamics and Particle Interactions

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.