The LHC Olympics 2020 a community challenge for anomaly detection in high energy physics.

Journal: Reports on progress in physics. Physical Society (Great Britain)
Published Date: Dec 7, 2021

Abstract

A new paradigm for data-driven, model-agnostic new physics searches at colliders is emerging, and aims to leverage recent breakthroughs in anomaly detection and machine learning. In order to develop and benchmark new anomaly detection methods within this framework, it is essential to have standard datasets. To this end, we have created the LHC Olympics 2020, a community challenge accompanied by a set of simulated collider events. Participants in these Olympics have developed their methods using an R&D dataset and then tested them on black boxes: datasets with an unknown anomaly (or not). Methods made use of modern machine learning tools and were based on unsupervised learning (autoencoders, generative adversarial networks, normalizing flows), weakly supervised learning, and semi-supervised learning. This paper will review the LHC Olympics 2020 challenge, including an overview of the competition, a description of methods deployed in the competition, lessons learned from the experience, and implications for data analyses with future datasets as well as future colliders.

Authors

  • Gregor Kasieczka
    Institut für Experimentalphysik, Universität Hamburg, Germany.
  • Benjamin Nachman
    Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America.
  • David Shih
    NHETC, Department of Physics & Astronomy, Rutgers University, Piscataway, NJ 08854, United States of America.
  • Oz Amram
    Department of Physics & Astronomy, The Johns Hopkins University, Baltimore, MD 21211, United States of America.
  • Anders Andreassen
    Google, Mountain View, CA 94043, United States of America.
  • Kees Benkendorfer
    Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America.
  • Blaz Bortolato
    Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
  • Gustaaf Brooijmans
    Nevis Laboratories, Columbia University, 136 S Broadway, Irvington NY 10533, United States of America.
  • Florencia Canelli
    Physik Institut, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
  • Jack H Collins
    SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94309, United States of America.
  • Biwei Dai
    Berkeley Center for Cosmological Physics, University of California, Berkeley, United States of America.
  • Felipe F De Freitas
    Departamento de Física da Universidade de Aveiro and CIDMA Campus de Santiago, 3810-183 Aveiro, Portugal.
  • Barry M Dillon
    Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
  • Ioan-Mihail Dinu
    Laboratoire de Physique de Clermont, Université Clermont Auvergne, France.
  • Zhongtian Dong
    Department of Physics & Astronomy, University of Kansas, 1251 Wescoe Hall Dr, Lawrence, KS 66045, United States of America.
  • Julien Donini
    Laboratoire de Physique de Clermont, Université Clermont Auvergne, France.
  • Javier Duarte
    University of California San Diego, La Jolla, CA 92093, United States of America.
  • D A Faroughy
    Physik Institut, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
  • Julia Gonski
    Nevis Laboratories, Columbia University, 136 S Broadway, Irvington NY 10533, United States of America.
  • Philip Harris
    Laboratory for Nuclear Science, MIT, 77 Massachusetts Ave, Cambridge, MA 02139, United States of America.
  • Alan Kahn
    Nevis Laboratories, Columbia University, 136 S Broadway, Irvington NY 10533, United States of America.
  • Jernej F Kamenik
    Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
  • Charanjit K Khosa
    Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom.
  • Patrick Komiske
    Center for Theoretical Physics, MIT, 77 Massachusetts Ave, Cambridge, MA 02139, United States of America.
  • Luc Le Pottier
    Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America.
  • Pablo Martín-Ramiro
    Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America.
  • Andrej Matevc
    Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
  • Eric Metodiev
    Center for Theoretical Physics, MIT, 77 Massachusetts Ave, Cambridge, MA 02139, United States of America.
  • Vinicius Mikuni
    Physik Institut, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
  • Christopher W Murphy
    Homepoint, Ann Arbor, MI 48105, United States of America.
  • Inês Ochoa
    Laboratory of Instrumentation and Experimental Particle Physics, Lisbon, Portugal.
  • Sang Eon Park
    Laboratory for Nuclear Science, MIT, 77 Massachusetts Ave, Cambridge, MA 02139, United States of America.
  • Maurizio Pierini
    European Organization for Nuclear Research (CERN), CH-1211, Geneva 23, Switzerland.
  • Dylan Rankin
    Laboratory for Nuclear Science, MIT, 77 Massachusetts Ave, Cambridge, MA 02139, United States of America.
  • Veronica Sanz
    Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom.
  • Nilai Sarda
    CSAIL, Massachusetts Institute of Technology, 32 Vassar Street, Cambridge, MA 02139, United States of America.
  • Urŏ Seljak
    Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America.
  • Aleks Smolkovic
    Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
  • George Stein
    Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America.
  • Cristina Mantilla Suarez
    Department of Physics & Astronomy, The Johns Hopkins University, Baltimore, MD 21211, United States of America.
  • Manuel Szewc
    International Center for Advanced Studies and CONICET, UNSAM, CP1650, Buenos Aires, Argentina.
  • Jesse Thaler
    Center for Theoretical Physics, MIT, 77 Massachusetts Ave, Cambridge, MA 02139, United States of America.
  • Steven Tsan
    University of California San Diego, La Jolla, CA 92093, United States of America.
  • Silviu-Marian Udrescu
    Laboratory for Nuclear Science, MIT, 77 Massachusetts Ave, Cambridge, MA 02139, United States of America.
  • Louis Vaslin
    Laboratoire de Physique de Clermont, Université Clermont Auvergne, France.
  • Jean-Roch Vlimant
    Division Office Physics, Math and Astronomy, California Institute of Technology, Pasadena, CA 91125, United States of America.
  • Daniel Williams
    Nevis Laboratories, Columbia University, 136 S Broadway, Irvington NY 10533, United States of America.
  • Mikaeel Yunus
    Laboratory for Nuclear Science, MIT, 77 Massachusetts Ave, Cambridge, MA 02139, United States of America.

Keywords

External Resources

Popular Topics
Recent Journals