Search for New Phenomena in Two-Body Invariant Mass Distributions Using Unsupervised Machine Learning for Anomaly Detection at √s = 13 TeV with the ATLAS Detector

The ATLAS collaboration; A. Berthold; C. Bittrich; P. Czodrowski; A. Hadef; T. Herrmann; M. Hils; D. Kirchmeier; M. Kobel; W. F. Mader; N. Madysa; M. Maerker; J. Manjarres Ramos; S. Morgenstern; O. Novgorodova; F. Siegert; A. Straessner; S. Todt; H. Torres; C. Wiel

doi:10.1103/PhysRevLett.132.081801

Search for New Phenomena in Two-Body Invariant Mass Distributions Using Unsupervised Machine Learning for Anomaly Detection at √s = 13 TeV with the ATLAS Detector

Research output: Contribution to journal › Research article › Contributed › peer-review

Contributors

The ATLAS collaboration - , University of Bucharest, iThemba Laboratory for Accelerator Based Sciences, University of Pretoria, University of South Africa, University of Zululand, Cadi Ayyad University, New York University Abu Dhabi, University of Granada, CERN, University of California at Berkeley, University of Georgia (Tbilisi), Yeditepe University, Mohammed VI Polytechnic University (Author)
A. Berthold - , Chair of Experimental Particle Physics, Institute of Nuclear and Particle Physics, TUD Dresden University of Technology (Author)
C. Bittrich - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
P. Czodrowski - , CERN (Author)
A. Hadef - , Johannes Gutenberg University Mainz (Author)
T. Herrmann - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
M. Hils - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
D. Kirchmeier - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
M. Kobel - , TUD Dresden University of Technology (Author)
W. F. Mader - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
N. Madysa - , Institute of Nuclear and Particle Physics, TUD Dresden University of Technology (Author)
M. Maerker - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
J. Manjarres Ramos - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
S. Morgenstern - , University of Warwick (Author)
O. Novgorodova - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
F. Siegert - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
A. Straessner - , Chair of Experimental Particle Physics, TUD Dresden University of Technology (Author)
S. Todt - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
H. Torres - , Chair of Particle Physics, TUD Dresden University of Technology (Author)
C. Wiel - , Chair of Particle Physics, TUD Dresden University of Technology (Author)

Aix-Marseille Université
University of Oklahoma
University of Massachusetts
University of Göttingen
Royal Holloway University of London
Brookhaven National Laboratory
Tel Aviv University
Technion-Israel Institute of Technology
Argonne National Laboratory
Pontificia Universidad Católica de Chile
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
King's College London (KCL)
Laboratoire d'Annecy-le-Vieux de Physique des Particules LAPP
AGH University of Science and Technology
University of Toronto
Brandeis University
Northern Illinois University
Istanbul University
University of Geneva
Rutherford Appleton Laboratory
University of California at Santa Cruz
Université Paris-Saclay
Institute for High Energy Physics
University of Pavia
Radboud University Nijmegen
Alexandru Ioan Cuza University of Iaşi
Laboratório de Instrumentação e Física Experimental de Partículas
Universidad Autónoma de Madrid

Abstract

Searches for new resonances are performed using an unsupervised anomaly-detection technique. Events with at least one electron or muon are selected from 140 fb⁻¹ of pp collisions at √s ¼ 13 TeV recorded by ATLAS at the Large Hadron Collider. The approach involves training an autoencoder on data, and subsequently defining anomalous regions based on the reconstruction loss of the decoder. Studies focus on nine invariant mass spectra that contain pairs of objects consisting of one light jet or b jet and either one lepton (e; μ), photon, or second light jet or b jet in the anomalous regions. No significant deviations from the background hypotheses are observed. Limits on contributions from generic Gaussian signals with various widths of the resonance mass are obtained for nine invariant masses in the anomalous regions.

Details

Original language	English
Article number	081801
Pages (from-to)	1-23
Number of pages	23
Journal	Physical review letters
Volume	132
Issue number	8
Publication status	Published - 20 Feb 2024
Peer-reviewed	Yes

External IDs

PubMed	38457710

Keywords

ASJC Scopus subject areas

General Physics and Astronomy