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The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations

Alwall, J. ; Frederix, R. LU orcid ; Frixione, S. ; Hirschi, V. ; Maltoni, F. ; Mattelaer, O. ; Shao, H. S. ; Stelzer, T. ; Torrielli, P. and Zaro, M. (2014) In Journal of High Energy Physics 2014(7).
Abstract

We discuss the theoretical bases that underpin the automation of the computations of tree-level and next-to-leading order cross sections, of their matching to parton shower simulations, and of the merging of matched samples that differ by light-parton multiplicities. We present a computer program, MadGraph5 aMC@NLO, capable of handling all these computations - parton-level fixed order, shower-matched, merged - in a unified framework whose defining features are flexibility, high level of parallelisation, and human intervention limited to input physics quantities. We demonstrate the potential of the program by presenting selected phenomenological applications relevant to the LHC and to a 1-TeV e ... (More)

We discuss the theoretical bases that underpin the automation of the computations of tree-level and next-to-leading order cross sections, of their matching to parton shower simulations, and of the merging of matched samples that differ by light-parton multiplicities. We present a computer program, MadGraph5 aMC@NLO, capable of handling all these computations - parton-level fixed order, shower-matched, merged - in a unified framework whose defining features are flexibility, high level of parallelisation, and human intervention limited to input physics quantities. We demonstrate the potential of the program by presenting selected phenomenological applications relevant to the LHC and to a 1-TeV e + e - collider. While next-to-leading order results are restricted to QCD corrections to SM processes in the first public version, we show that from the user viewpoint no changes have to be expected in the case of corrections due to any given renormalisable Lagrangian, and that the implementation of these are well under way.

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author
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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Monte Carlo Simulations, NLO Computations
in
Journal of High Energy Physics
volume
2014
issue
7
article number
79
publisher
Springer
external identifiers
  • scopus:84904754026
ISSN
1029-8479
DOI
10.1007/JHEP07(2014)079
language
English
LU publication?
no
id
3ea3f61d-99ff-4dcc-9c6a-fe647608db2b
date added to LUP
2019-05-28 15:36:56
date last changed
2022-04-26 00:37:06
@article{3ea3f61d-99ff-4dcc-9c6a-fe647608db2b,
  abstract     = {{<p>                            We discuss the theoretical bases that underpin the automation of the computations of tree-level and next-to-leading order cross sections, of their matching to parton shower simulations, and of the merging of matched samples that differ by light-parton multiplicities. We present a computer program, MadGraph5 aMC@NLO, capable of handling all these computations - parton-level fixed order, shower-matched, merged - in a unified framework whose defining features are flexibility, high level of parallelisation, and human intervention limited to input physics quantities. We demonstrate the potential of the program by presenting selected phenomenological applications relevant to the LHC and to a 1-TeV e                             <sup>+</sup>                             e                             <sup>-</sup>                             collider. While next-to-leading order results are restricted to QCD corrections to SM processes in the first public version, we show that from the user viewpoint no changes have to be expected in the case of corrections due to any given renormalisable Lagrangian, and that the implementation of these are well under way.</p>}},
  author       = {{Alwall, J. and Frederix, R. and Frixione, S. and Hirschi, V. and Maltoni, F. and Mattelaer, O. and Shao, H. S. and Stelzer, T. and Torrielli, P. and Zaro, M.}},
  issn         = {{1029-8479}},
  keywords     = {{Monte Carlo Simulations; NLO Computations}},
  language     = {{eng}},
  number       = {{7}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations}},
  url          = {{http://dx.doi.org/10.1007/JHEP07(2014)079}},
  doi          = {{10.1007/JHEP07(2014)079}},
  volume       = {{2014}},
  year         = {{2014}},
}