J
Johan Alwall
Researcher at Stanford University
Publications - 45
Citations - 16221
Johan Alwall is an academic researcher from Stanford University. The author has contributed to research in topics: Physics beyond the Standard Model & Parton. The author has an hindex of 28, co-authored 45 publications receiving 14230 citations. Previous affiliations of Johan Alwall include Fermilab & Université catholique de Louvain.
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Journal ArticleDOI
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
Johan Alwall,Rikkert Frederix,Stefano Frixione,Valentin Hirschi,Fabio Maltoni,Olivier Mattelaer,Hua-Sheng Shao,Tim Stelzer,Paolo Torrielli,Marco Zaro,Marco Zaro +10 more
TL;DR: MadGraph5 aMC@NLO as discussed by the authors is a computer program capable of handling all these computations, including 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.
Journal ArticleDOI
MadGraph 5: going beyond
TL;DR: The ideas and the most important developments of the code are described and the capabilities of the MadGraph matrix element generator are illustrated through a few simple phenomenological examples.
Journal ArticleDOI
MadGraph/MadEvent v4: the new web generation
Johan Alwall,Pavel Demin,Simon De Visscher,Rikkert Frederix,Michel Herquet,Fabio Maltoni,Tilman Plehn,David L. Rainwater,Tim Stelzer +8 more
TL;DR: MadGraph/MadEvent Monte Carlo as mentioned in this paper is a Monte Carlo event generator for hadron collider physics that can be used to generate events at the parton, hadron and detector level from a web interface.
Journal ArticleDOI
Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
Johan Alwall,Stefan Höche,Frank Krauss,Nils Lavesson,Leif Lönnblad,Fabio Maltoni,Michelangelo L. Mangano,M. Moretti,Costas G. Papadopoulos,Fulvio Piccinini,Steffen Schumann,Michele Treccani,J. Winter,Malgorzata Worek,Malgorzata Worek +14 more
TL;DR: In this article, the authors compare different procedures for combining fixed-order tree-level matrix-element generators with parton showers and find that although similar results are obtained in all cases, there are important differences.
Journal ArticleDOI
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
Johan Alwall,Rikkert Frederix,Stefano Frixione,Valentin Hirschi,Fabio Maltoni,Olivier Mattelaer,Hua-Sheng Shao,Tim Stelzer,Paolo Torrielli,Marco Zaro,Marco Zaro +10 more
TL;DR: MadGraph5_aMC@NLO as discussed by the authors is a computer program capable of handling parton-level fixed order, shower-matched, merged computations in a unified framework whose defining features are flexibility, high level of parallelisation, and human intervention limited to input physics quantities.