GoSam-2.0: a tool for automated one-loop calculations within the Standard Model and beyond

By G. Cullen, H. Deurzen, Nicolas Greiner, Gudrun Heinrich, G. Luisoni, Pierpaolo Mastrolia, E. Mirabella, G. Ossola, Tiziano Peraro, Johannes Schlenk and 2 more. 2014

264 citations recorded by the source corpus.

We present the version 2.0 of the program package GoSam for the automated calculation of one-loop amplitudes. GoSam is devised to compute one-loop QCD and/or electroweak corrections to multi-particle processes within and beyond the Standard Model. The new code contains improvements in the generation and in the reduction of the amplitudes, performs better in computing time and numerical accuracy, and has an extended range of applicability. The extended version of the “Binoth-Les-Houches-Accord” interface to Monte Carlo programs is also implemented. We give a detailed description of installation and usage of the code, and illustrate the new features in dedicated examples.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/86bdf79d77a2767789534b8418c29010e6c66880

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Citations in the corpus

String formation beyond leading colour (2015, background): “Perturbative aspects, such as hard-process matrix elements, parton showers, and decay (chains) of short-lived resonances, are generally coming under increasingly good control, due to a combination of advances: better amplitude calculations (including better automation and better interfaces [5–12]), ”
Higgs boson pair production at NNLO with top quark mass effects (2018, methodology): “[16, 17], which in turn for the calculation of the two-loop amplitudes relies on an extension of the program GoSam [39, 40] to two loops [41], using also Reduze2 [42], SecDec3 [43] and the Quasi-Monte Carlo technique as described in Ref.”
Measurements of Higgs boson properties in the diphoton decay channel with 36 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} = 13$ TeV with the ATLAS detector (2018, unknown): “The one-loop corrections are incorporated from GoSam [119, 120] and the different jet multiplicity regions are merged using the Meps@Nlo multijet merging technique.”
Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, methodology): “External OLPs can also be interfaced to MadGraph5_aMC@NLO, using the Binoth Les Houches Accord (BLHA) standard [505,506] (as for example done withGoSam [87] in Ref.”
Event generation with Sherpa 2.2 (2019, methodology): “Renormalised QCD virtual corrections are obtained either through dedicated interfaces from programs and libraries like BLACKHAT [13, 70, 71, 72], MADGRAPH [73, 74], OPENLOOPS [14] and RECOLA [75], or through the generic Binoth Les-Houches Accord interface [76, 77] from codes like GOSAM [78, 79] or N”
Herwig 7.0/Herwig++ 3.0 release note (2015, methodology): “Based on extensions of the BLHA standard [26,27], Herwig currently supports interfaces to GoSam [28], MadGraph [29], NJet [30], OpenLoops[31] and VBFNLO [32,33].”
The automation of next-to-leading order electroweak calculations (2018, methodology): “Indeed, although not as comprehensive as for QCD computations, there has been steady progress in the automation of EW NLO corrections, for both one-loop and realemission contributions, by collaborations such as RECOLA [8, 9] with Sherpa [10, 11], OpenLoops [12] with Sherpa, GoSam [13, 14] with eithe”
Les Houches 2015: Physics at TeV Colliders Standard Model Working Group Report (2016, methodology): “The benefit of NLO accuracy is clearly seen in the GOSAM+SHERPA result, which has large corrections with respect to POWHEG.”
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].”
Physics at a 100 TeV pp collider: Higgs and EW symmetry breaking studies (2016, methodology): “The signal events are generated at LO (using the MadLoop/aMC@NLO [253] and GoSam [75] packages) and the NLO effects are taken into account through a rescaling by a k-factor k = 2.”
NLO electroweak automation and precise predictions for W + multijet production at the LHC (2014, methodology): “Important steps towards the automation of NLO EW corrections have been undertaken also within the Madgraph5 aMC@NLO framework [41, 42] and by the GoSam [43] collaboration.”
On-the-fly reduction of open loops (2017, background): “2a w b (k b,h) ×w σ c c(k,h) w d d(k,h). (19) The recursion ends when all oﬀ-shell propagators that have been cut in the beginning can be reconnected, such as to obtain the colour-stripped amplitudes (17) for the full set of tree diagrams. Note that (18)–(19) are analogous to Berends–Giele recurrenc”