Comix, a new matrix element generator

By T. Gleisberg, Stefan Hoeche. 2008

1,183 citations recorded by the source corpus.

We present a new tree-level matrix element generator, based on the color dressed Berends-Giele recursive relations. We discuss two new algorithms for phase space integration, dedicated to be used with large multiplicities and color sampling.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6046ff5a3e3ab7259b231aa89274cf8dd725e676

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

In Nuclear and High Energy Physics

Citations in the corpus

Event generation with Sherpa 2.2 (2019, methodology): “e construction of typically one channel per diagram [6]. Within C OMIX , the method is recast into a recursive algorithm, reducing the factorial growth in the number of channels to an exponential one [7]. Both A MEGIC and C OMIX further optimise the integration over propagator masses and polar angle”
MadAnalysis 5, a user-friendly framework for collider phenomenology (2012, background): “This has triggered, during the last twenty years, a lot of efforts dedicated to the development of multi-purpose matrix-element based event generators such as Alpgen [1], Comix [2], CompHep/CalcHep [3, 4, 5], Helac [6], MadGraph/MadEvent [7, 8, 9, 10, 11], Sherpa [12, 13] and Whizard [14, 15].”
MadGraph 5: going beyond (2011, methodology): “More recently, highly eﬃcient multiparton techniques which go beyond usual Feynman diagrams have been introduced [9, 10, 11], and implemented in publicly available codes, such as Alpgen [12], Helac [13] and Comix [14].”
General-purpose event generators for LHC physics (2011, neutral): “57 5.5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57”
Event generation with SHERPA 1.1 (2008, methodology): “m has been 9 For the sake of backward-compatibility, these interfaces are kept available. 39 implemented within AMEGIC++ [126], and a new matrix-element generator for very large multiplicities, COMIX [57], has been constructed. These new modules, have not been released yet as part of SHERPA, but are”
Search for additional heavy neutral Higgs and gauge bosons in the ditau final state produced in 36 fb−1 of pp collisions at s=13$$ \sqrt{s}=13 $$ TeV with the ATLAS detector (2018, methodology): “Matrix elements were calculated for up to two partons at NLO and four partons at LO using Comix [100] and OpenLoops [101] merged with the Sherpa parton shower [102]”
Search for electroweak production of supersymmetric states in scenarios with compressed mass spectra at √s = 13 TeV with the ATLAS detector (2017, positive): “Depending on the process, matrix elements were calculated for up to two partons at h ð → ll ; WW Þ NLO and up to four partons at LO using COMIX [74] and OPENLOOPS [75], and merged with the SHERPA parton shower [76] according to the ME+PS@NLO prescription [77].”
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations (2014, methodology): “cedure is manageable notwidthstanding the fact that the number of Feynman diagrams might grow factorially. Otherwise, other techniques that go beyond the Feynman-diagram expansion have to be employed [45,49,52,117]. The algorithm used in MadGraph5 aMC@NLOfor the determination of the Feynman diagrams”
UFO - The Universal FeynRules Output (2011, methodology): “Automated tree-level matrix-element generators, such as Alpgen [1], Comix [2], CompHep / CalcHep [3,4,5], Helac [6], Herwig [7,8], MadGraph/MadEvent [9,10,11,12,13], Sherpa [14,15], or Whizard [16,17], describing the hard scattering processes where the Beyond the Standard Model (BSM) physics is…”
Search for new phenomena in final states with large jet multiplicities and missing transverse momentum using sqrt(s)=7 TeV pp collisions with the ATLAS detector (2011, methodology): “4 The values of R n for N jet ∈ { 5 , 6 , 7 have been cross checked against SHERPA [19–21] with COMIX [53] and agreement found at the 20% level.”