Automated one-loop calculations with GoSam

By G. Cullen, Nicolas Greiner, Gudrun Heinrich, G. Luisoni, Pierpaolo Mastrolia, G. Ossola, Thomas Reiter, Francesco Tramontano. 2011

469 citations recorded by the source corpus.

We present the program package GoSam which is designed for the automated calculation of one-loop amplitudes for multi-particle processes in renormalisable quantum field theories. The amplitudes, which are generated in terms of Feynman diagrams, can be reduced using either D-dimensional integrand-level decomposition or tensor reduction. GoSam can be used to calculate one-loop QCD and/or electroweak corrections to Standard Model processes and offers the flexibility to link model files for theories Beyond the Standard Model. A standard interface to programs calculating real radiation is also implemented. We demonstrate the flexibility of the program by presenting examples of processes with up to six external legs attached to the loop.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0cdad7cfa14a1c2079b3b789d5853e7f4a70d5e0

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In Nuclear and High Energy Physics

Citations in the corpus

Combined measurements of Higgs boson production and decay using up to $80$ fb$^{-1}$ of proton-proton collision data at $\sqrt{s}=$ 13 TeV collected with the ATLAS experiment (2019, methodology): “The qq → VH production processes were simulated to NLO accuracy in QCD using the POWHEG BOX, GOSAM [72] and MINLO [51,73] generators with the PDF4LHC15 set of PDFs.”
GoSam-2.0: a tool for automated one-loop calculations within the Standard Model and beyond (2014, methodology): “The development of automated NLO tools has seen tremendous progress in the past years, leading to public codes [3–7] which are able to produce multi-particle NLO predictions for user-defined processes, or to dedicated frameworks [8–15], which allowed to produce an impressive collection of NLO proces”
Automated event generation for loop-induced processes (2015, methodology): “This is to be contrasted with the fact that loop-induced amplitudes for many relevant processes are already available in the main public one-loop matrix element providers [10–14].”
SARAH 4: A tool for (not only SUSY) model builders (2013, methodology): “For SUSY and non-SUSY models the calculated vertices can be used to write model ﬁles for CalcHep / CompHep [20, 21], FeynArts / FormCalc [22, 23], WHIZARD / O’Mega [24, 25] as well as in the UFO format [26] which can be handled for instance by MadGraph 5 [27], GoSam [28] and Herwig++ [29–31].”
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, methodology): “The results are obtained by using a fully automated framewor k for fixed order NLO QCD calculations based on the interplay of the packages GOSAM [299] and SHERPA [162].”
Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, methodology): “GoSam — Sherpa+GoSam GoSam [87, 480] is a publicly available tool for the automated generation of virtual amplitudes.”
Electroweak radiative corrections for collider physics (2019, methodology): “• GoSam [298, 299] was extended to allow for the calculation of NLO EW corrections [326].”
Full top quark mass dependence in Higgs boson pair production at NLO (2016, methodology): “(2.18) The virtual amplitude has been generated with an extension of the program GoSam [70, 71], where the diagrams are generated using Qgraf [72] and then further processed using Form [73, 74].”
A brief introduction to modern amplitude methods (2013, unknown): “These new, efficient methods have enabled the construction of a variety of automated computer programs for generating one-loop amplitudes, including CutTools [47], BlackHat [35], Rocket [48], SAMURAI [49], NGluon [50], MadLoop [51], HELACNLO [52], GoSam [53], Open Loops [54] and Recola [55].”
UFO - The Universal FeynRules Output (2011, methodology): “Hence, the one-loop matrix-element generator GoSam [24,25,26] contains an interface to the UFO format, where the information from the Python module described in Section 2 is translated into a model deﬁnition for the QGraf package [43] together with a Form [44] module substituting the expressions…”