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Introduction
A software framework for statistical data analysis, called HistFitter, is presented here.
HistFitter has been used extensively by the ATLAS Collaboration to analyze big datasets
originating from proton-proton collisions at the Large Hadron Collider at CERN.
Since 2012 HistFitter has been the standard statistical tool in searches for supersymmetric
particles performed by ATLAS. HistFitter is a programmable and flexible framework to build, book-keep, fit, interpret and present
results of data models of nearly arbitrary complexity.
It extends existing statistics tools in four key areas:
The HistFitter Group
The HistFitter group are:- Max Baak (CERN, Switzerland)
- Geert-Jan Besjes (Niels Bohr Institute, University of Copenhagen, Denmark)
- David Côté (University of Texas, USA)
- Alex Koutsman (TRIUMF, Canada)
- Jeanette Lorenz (LMU/Excellence Cluster Universe, Germany)
- Dan Short (University of Oxford, UK)
Acknowledgements:
We are grateful to the RooFit, RooStats, and HistFactory authors for a fruitful collaboration and useful feedback,
in particular to Kyle Cranmer, Lorenzo Moneta and Wouter Verkerke.
We like to thank the ATLAS collaboration and its SUSY physics group for useful discussions and suggestions for the development of HistFitter. We are specifically grateful to following members of the ATLAS SUSY physics group for their support and contributions to the development of HistFitter: Andreas Hoecker, Till Eifert, Zachary Marshall, Emma Sian Kuwertz, Evgeny Khramov, Sophio Pataraia and Marcello Barisonzi.
For graphical support and development we extend our gratitude to Solkin Keizer.
We also kindly thank the Gfitter group for using their web page style.
This work has been supported by:
- CERN, Switzerland;
- The DFG cluster of excellence "Origin and Structure of the Universe", Germany;
- The Natural Sciences and Engineering Research Council of Canada and the ATLAS-Canada Subatomic Physics Project Grant, Canada;
- The Department Of Energy and the National Science Foundation of the United States of America, United States of America;
- FOM and NWO, the Netherlands;
- STFC, United Kingdom.