GAMBIT and its application in the search for physics Beyond the Standard Model

Abstract

The Global and Modular Beyond-Standard Model Inference Tool (GAMBIT) is an open source software framework for performing global statistical fits of particle physics models, using a wide range of particle and astroparticle data. In this review, we describe the design principles of the package, the statistical and sampling frameworks, the experimental data included, and the first two years of physics results generated with it. This includes supersymmetric models, axion theories, Higgs portal dark matter scenarios and an extension of the Standard Model to include right-handed neutrinos. Owing to the broad spectrum of physics scenarios tackled by the GAMBIT community, this also serves as a convenient, self-contained review of the current experimental and theoretical status of the most popular models of dark matter.

Reinterpretation of LHC Results for New Physics: Status and recommendations after Run 2

“…CheckMATE [95,96], MadAnalysis 5 [18,19,97,98], GAMBIT's ColliderBit [12,[99][100][101] and Rivet [48,49] (and hence Contur [61], which interprets Rivet analysis outputs). There are also two interpreters of the recently developed domain-specific Analysis Description Language (ADL) [51,52]: adl2tnm [20] and CutLang [53,54].…”

“…In GAMBIT [99,100] Emphasising the combination of full event generation and speed, ColliderBit uses a smearing approach to detector simulation, through its BuckFast routines, and takes published efficiency functions from the individual experiments. Cross-sections are currently taken from Pythia; future versions will support cross-sections from other external tools.…”

“…Global fits are performed in the context of a full model rather than that of a simplified model, since it is in full models where correlations between different data (including search and indirect data such as electroweak fits) are present and relevant. The problem of translating global fits in one full model into fits in another full model is dealt with by public global fitting packages such as GAMBIT [99,100], MasterCode [152][153][154] and HEPFit [147].…”

Reinterpretation of LHC Results for New Physics: Status and Recommendations after Run 2

“…5 Reinterpretation by means of MC simulation is more generally applicable and more precise but also more difficult and much more time consuming. There are a number of public software frameworks with this aim, each coming with their own set of implemented analyses: CheckMATE [95,96], MadAnalysis 5 [18,19,97,98], GAMBIT's ColliderBit [12,[99][100][101] and Rivet [48,49] (and hence Contur [61], which interprets Rivet analysis outputs). There are also two interpreters of the recently developed domain-specific Analysis Description Language (ADL) [51,52]: adl2tnm [20] and CutLang [53,54].…”

“…In GAMBIT [99,100] the reinterpretation of collider results is handled by the ColliderBit module [101]. This currently allows for the fast simulation of LHC events using a parallelised version of Pythia 8 [105,106].…”