CheckMATE: Checkmating new physics at the LHC

Abstract

In the first four years of running, the LHC has delivered a wealth of new data that is now being analysed. The two multi-purpose detectors, ATLAS and CMS, have performed many searches for new physics but theorists are eager to test their own particular model. We present the latest developments to the program CheckMATE (Check Models At Terascale Energies) that helps to automate this procedure so that new theories can easily be checked against the latest results. The backbone of CheckMATE is a library of over 50 LHC analyses that new physics models can be tested against. The user only needs to provide a model in SLHA format and CheckMATE will automatically decide if the model is ruled out or not. In addition, if new physics begins to appear, CheckMATE offers the possibility to quickly determine the model that best fits the data. Finally, a novel technique using kinematic transformations of existing events is presented that promises to speed up the determination of model best fit points by orders of magnitude.

Probing the electroweakino sector of general gauge mediation at the LHC

“…The truth level MC events are generated with the help of Pythia 8.219 [73] employing the default parton distribution function (PDF) NNPDF 2.3 set [73] while keeping the default values in the MC tools. We interfaced the truth level events to CheckMATE 2.0.2 [40,49,74,75] which is based on the fast detector simulation Delphes 3.4.0 [76] and the jet reconstruction tool Fastjet 3.2.1 [77]. CheckMATE tests a model point against current ATLAS and CMS searches at 95% confidence level.…”

CutLang v2: Advances in a Runtime-Interpreted Analysis Description Language for HEP Data

“…At the LHC, almost all analysis teams have their own frameworks. There are also frameworks like CheckMate ( Drees et al, 2015 ; Kim et al, 2015 ; Tattersall et al, 2016 ) and MadAnalysis ( Conte et al, 2013 ; Conte and Fuks, 2014 ) for phenomenology studies, and Rivet ( Waugh et al, 2006 ; Buckley et al, 2013 ) focused on preserving LHC analyses with unfolded results for comparison with Monte Carlo event generator predictions. Yet, working with multiple frameworks is an extra challenge, since each framework has a different way of implementing the physics content.…”

“…A transpiler called adl2tnm converting ADL to C++ code is currently under development ( Brooijmans et al, 2018 ). Earlier prototype transpilers converting LHADA into code snippets that could be integrated within CheckMate ( Drees et al, 2015 ; Kim et al, 2015 ; Tattersall et al, 2016 ) and Rivet ( Waugh et al, 2006 ; Buckley et al, 2013 ) frameworks were also studied. The other approach is that of runtime interpretation.…”

CutLang: A Particle Physics Analysis Description Language and Runtime Interpreter

“…For example, LHC experiments are converging towards fewer analysis frameworks that are developed and maintained by dedicated experts. On the phenomenology side, frameworks such as CheckMate [6,7,8] and MadAnalysis [9,10,11,12] exist, which implement a sizable number of LHC new physics search analyses ready for use in reinterpretation studies. Similarly, Rivet [13,14] hosts a large repository of LHC analyses implemented by the original analysts.…”