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Fastlim: a fast LHC limit calculator

Fastlim is a tool to calculate conservative limits on extensions of the Standard Model from direct LHC searches without performing any Monte Carlo event generation. The program reconstructs the visible cross sections from pre-calculated efficiency tables and cross section tables for simplified event...

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Detalles Bibliográficos
Autores principales: Papucci, Michele, Sakurai, Kazuki, Weiler, Andreas, Zeune, Lisa
Lenguaje:eng
Publicado: 2014
Materias:
Acceso en línea:https://dx.doi.org/10.1140/epjc/s10052-014-3163-1
http://cds.cern.ch/record/1646289
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author Papucci, Michele
Sakurai, Kazuki
Weiler, Andreas
Zeune, Lisa
author_facet Papucci, Michele
Sakurai, Kazuki
Weiler, Andreas
Zeune, Lisa
author_sort Papucci, Michele
collection CERN
description Fastlim is a tool to calculate conservative limits on extensions of the Standard Model from direct LHC searches without performing any Monte Carlo event generation. The program reconstructs the visible cross sections from pre-calculated efficiency tables and cross section tables for simplified event topologies. As a proof of concept of the approach, we have implemented searches relevant for supersymmetric models with R-parity conservation. Fastlim takes the spectrum and coupling information of a given model point and provides, for each signal region of the implemented analyses, the visible cross sections normalised to the corresponding upper limit, reported by the experiments, as well as the exclusion $p$-value. To demonstrate the utility of the program we study the sensitivity of the recent ATLAS missing energy searches to the parameter space of natural SUSY models. The program structure allows the straight-forward inclusion of external efficiency tables and can be generalised to R-parity violating scenarios and non-SUSY models. This paper serves as a self-contained user guide, and indicates the conventions and approximations used.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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spelling cern-16462892023-05-22T07:43:55Zdoi:10.1140/epjc/s10052-014-3163-1http://cds.cern.ch/record/1646289engPapucci, MicheleSakurai, KazukiWeiler, AndreasZeune, LisaFastlim: a fast LHC limit calculatorParticle Physics - PhenomenologyFastlim is a tool to calculate conservative limits on extensions of the Standard Model from direct LHC searches without performing any Monte Carlo event generation. The program reconstructs the visible cross sections from pre-calculated efficiency tables and cross section tables for simplified event topologies. As a proof of concept of the approach, we have implemented searches relevant for supersymmetric models with R-parity conservation. Fastlim takes the spectrum and coupling information of a given model point and provides, for each signal region of the implemented analyses, the visible cross sections normalised to the corresponding upper limit, reported by the experiments, as well as the exclusion $p$-value. To demonstrate the utility of the program we study the sensitivity of the recent ATLAS missing energy searches to the parameter space of natural SUSY models. The program structure allows the straight-forward inclusion of external efficiency tables and can be generalised to R-parity violating scenarios and non-SUSY models. This paper serves as a self-contained user guide, and indicates the conventions and approximations used.Fastlim is a tool to calculate conservative limits on extensions of the Standard Model from direct LHC searches without performing any Monte Carlo event generation. The program reconstructs the visible cross sections (cross sections after event selection cuts) from pre-calculated efficiency tables and cross section tables for simplified event topologies. As a proof of concept of the approach, we have implemented searches relevant for supersymmetric models with R-parity conservation. Fastlim takes the spectrum and coupling information of a given model point and provides, for each signal region of the implemented analyses, the visible cross sections normalised to the corresponding upper limit, reported by the experiments, as well as the $\mathrm{CL}_\mathrm{s}$ value. To demonstrate the utility of the program we study the sensitivity of the recent ATLAS missing energy searches to the parameter space of natural SUSY models. The program structure allows the straightforward inclusion of external efficiency tables and can be generalised to R-parity violating scenarios and non-SUSY models. This paper serves as a self-contained user guide and indicates the conventions and approximations used.Fastlim is a tool to calculate conservative limits on extensions of the Standard Model from direct LHC searches without performing any Monte Carlo event generation. The program reconstructs the visible cross sections from pre-calculated efficiency tables and cross section tables for simplified event topologies. As a proof of concept of the approach, we have implemented searches relevant for supersymmetric models with R-parity conservation. Fastlim takes the spectrum and coupling information of a given model point and provides, for each signal region of the implemented analyses, the visible cross sections normalised to the corresponding upper limit, reported by the experiments, as well as the exclusion $p$-value. To demonstrate the utility of the program we study the sensitivity of the recent ATLAS missing energy searches to the parameter space of natural SUSY models. The program structure allows the straight-forward inclusion of external efficiency tables and can be generalised to R-parity violating scenarios and non-SUSY models. This paper serves as a self-contained user guide, and indicates the conventions and approximations used.arXiv:1402.0492CERN-PH-TH-2014-019DESY-14-010KCL-PH-TH-2014-04MCTP-14-03CERN-PH-TH-2014-019DESY 14-010KCL-PH-TH-2014-04MCTP-14-03oai:cds.cern.ch:16462892014-02-03
spellingShingle Particle Physics - Phenomenology
Papucci, Michele
Sakurai, Kazuki
Weiler, Andreas
Zeune, Lisa
Fastlim: a fast LHC limit calculator
title Fastlim: a fast LHC limit calculator
title_full Fastlim: a fast LHC limit calculator
title_fullStr Fastlim: a fast LHC limit calculator
title_full_unstemmed Fastlim: a fast LHC limit calculator
title_short Fastlim: a fast LHC limit calculator
title_sort fastlim: a fast lhc limit calculator
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1140/epjc/s10052-014-3163-1
http://cds.cern.ch/record/1646289
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AT sakuraikazuki fastlimafastlhclimitcalculator
AT weilerandreas fastlimafastlhclimitcalculator
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