Report on 2105.14027v2
Abstract
We describe the outcome of a data challenge conducted as part of the Dark Machines (https://www.darkmachines.org)initiative and the Les Houches 2019 workshop on Physics at TeV colliders.The challenged aims to detect signals of new physics at the Large Hadron Collider (LHC) using unsupervised machine learning algorithms.First, we propose how an anomaly score could be implemented to define model-independent signal regions in LHC searches.We define and describe a large benchmark dataset, consisting of > 1 billion simulated LHC events corresponding to 10 fb -1 of proton-proton collisions at a center-of-mass energy of 13 TeV.We then review a wide range of anomaly detection and density estimation algorithms, developed in the context of the data challenge, and we measure their performance in a set of realistic analysis environments.We draw a number of useful conclusions that will aid the development of unsupervised new physics searches during the third run of the LHC, and provide our benchmark dataset for future studies at https
Authors 37
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European Organization for Nuclear Research
Affiliation as printed
European Organization for Nuclear Research (CERN) , 1211 Geneva 23 , Switzerland
European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
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Affiliation as printed
Rudolf Peierls Centre for Theoretical Physics , Oxford OX1 3PU , United Kingdom
Rudolf Peierls Centre for Theoretical Physics, Oxford OX1 3PU, United Kingdom
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Queen Mary University of London
Affiliation as printed
Queen Mary University of London , UK
Queen Mary University of London, UK
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Affiliation as printed
Ohio State University , Columbus , OH 43210 , USA
Ohio State University, Columbus, OH 43210, USA
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National Institute for Subatomic Physics
Affiliation as printed
Nikhef , 1098 XG Amsterdam , Netherlands
Nikhef, 1098 XG Amsterdam, Netherlands
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Queen Mary University of London
Affiliation as printed
Queen Mary University of London , UK
Queen Mary University of London, UK
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Scuola Internazionale Superiore di Studi Avanzati · Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
Affiliation as printed
INFN , 34149 Trieste TS , Italy
SISSA , 34136 Trieste TS , Italy
INFN, 34149 Trieste TS, Italy
SISSA, 34136 Trieste TS, Italy
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Affiliation as printed
Lund University , Lund , Sweden
Lund University, Lund, Sweden
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University of California San Diego
Affiliation as printed
University of California San Diego , La Jolla , CA 92093 , USA
University of California San Diego, La Jolla, CA 92093, USA
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The University of Texas at Arlington
Affiliation as printed
University of Texas at Arlington , Arlington , TX 76019 , USA
University of Texas at Arlington, Arlington, TX 76019, USA
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National Institute for Subatomic Physics
Affiliation as printed
Nikhef , 1098 XG Amsterdam , Netherlands
Nikhef, 1098 XG Amsterdam, Netherlands
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European Organization for Nuclear Research
Affiliation as printed
European Organization for Nuclear Research (CERN) , 1211 Geneva 23 , Switzerland
European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
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Worcester Polytechnic Institute · Konkuk University · The University of Adelaide · European Organization for Nuclear Research
Affiliation as printed
Worcester Polytechnic Institute n Konkuk University , Seoul , Republic of Korea
European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
University of Adelaide, Adelaide SA 5005, Australia
Worcester Polytechnic Institute n Konkuk University, Seoul, Republic of Korea o
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European Organization for Nuclear Research
Affiliation as printed
European Organization for Nuclear Research (CERN) , 1211 Geneva 23 , Switzerland
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Affiliation as printed
Lund University , Lund , Sweden
Lund University, Lund, Sweden
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Affiliation as printed
University of Adelaide , Adelaide SA 5005 , Australia
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Instituto de Física Corpuscular
Affiliation as printed
Instituto de Física Corpuscular , IFIC-UV/CSIC , 46980 Paterna , Valencia , Spain
Instituto de Física Corpuscular, IFIC-UV/CSIC, 46980 Paterna, Valencia, Spain
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Affiliation as printed
Rice University , Houston , TX 77005 , USA
Rice University, Houston, TX 77005, USA
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Alessandro Morandini Aachen
Affiliation as printed
RWTH Aachen University , 52062 Aachen , Germany
RWTH Aachen University, 52062 Aachen, Germany
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National Institute for Subatomic Physics
Affiliation as printed
Nikhef , 1098 XG Amsterdam , Netherlands
Nikhef, 1098 XG Amsterdam, Netherlands
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National Institute for Subatomic Physics
Affiliation as printed
Nikhef , 1098 XG Amsterdam , Netherlands
Nikhef, 1098 XG Amsterdam, Netherlands
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California Institute of Technology · Fermi National Accelerator Laboratory
Affiliation as printed
California Institute of Technology , Pasadena , CA 91125 , USA
Fermi National Accelerator Laboratory , Batavia , IL 60510 , USA
California Institute of Technology, Pasadena, CA 91125, USA
Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
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Harvard University · Kyungpook National University · The NSF AI Institute for Artificial Intelligence and Fundamental Interactions
Affiliation as printed
Harvard University , Cambridge , MA 02138 , USA
The NSF AI Institute for Artificial Intelligence and Fundamental Interactions w Department of Physics , Kyungpook National University , Daegu , South Korea
Harvard University, Cambridge, MA 02138, USA
The NSF AI Institute for Artificial Intelligence and Fundamental Interactions w Department of Physics, Kyungpook National University, Daegu, South Korea
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European Organization for Nuclear Research
Affiliation as printed
European Organization for Nuclear Research (CERN) , 1211 Geneva 23 , Switzerland
European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
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National and Kapodistrian University of Athens · European Organization for Nuclear Research
Affiliation as printed
European Organization for Nuclear Research (CERN) , 1211 Geneva 23 , Switzerland
National and Kapodistrian University of Athens , Athens 157 72 , Greece
European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
National and Kapodistrian University of Athens, Athens 157 72, Greece
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University of Vienna · University of Houston · University College London
Affiliation as printed
University of Houston , Houston , TX 77004 , USA
University of Houston, Houston, TX 77004, USA
z University College London, London WC1E 6BT, United Kingdom
α University of Vienna, 1010 Wien, Austria
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California Institute of Technology
Affiliation as printed
California Institute of Technology , Pasadena , CA 91125 , USA
California Institute of Technology, Pasadena, CA 91125, USA
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Affiliation as printed
University College London , London WC1E 6BT , United Kingdom
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Affiliation as printed
University of Adelaide , Adelaide SA 5005 , Australia
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Affiliation as printed
Lund University , Lund , Sweden
Lund University, Lund, Sweden
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Affiliation as printed
Lund University , Lund , Sweden
Lund University, Lund, Sweden
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University of Vienna · European Organization for Nuclear Research
Affiliation as printed
European Organization for Nuclear Research (CERN) , 1211 Geneva 23 , Switzerland
University of Vienna , 1010 Wien , Austria
European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland
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National Institute for Subatomic Physics
Affiliation as printed
Nikhef , 1098 XG Amsterdam , Netherlands
Nikhef, 1098 XG Amsterdam, Netherlands
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