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

Alwall, Johan; Hoche, Stefan; Krauss, F.; Lavesson, N.; Lonnblad, L.; Maltoni, F.; Mangano, M.L.; Moretti, M.; Papadopoulos, C.G.; Piccinini, F.

doi:10.1140/epjc/s10052-007-0490-5

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

Jun, 2007

44 pages

Published in:

Eur.Phys.J.C 53 (2008) 473-500

e-Print:

0706.2569 [hep-ph]

DOI:

10.1140/epjc/s10052-007-0490-5

Report number:

SLAC-PUB-12604,
CERN-PH-TH-2007-066,
LU-TP-07-13,
KA-TP-06-2007,
DCPT-07-62,
IPPP-07-31

Experiments:

Sherpa

View in:

pdf

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Abstract: (arXiv)

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.

anti-p p: interaction
p p: interaction
jet: multiple production
W: associated production
hard scattering
tree approximation
parton: showers
data analysis method
form factor: Sudakov
model: dipole

References(48)

Figures(0)

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