DOE OSTI · 3025736
Weakly supervised anomaly detection for resonant new physics in the dijet final state using proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
Abstract
An anomaly detection search for narrow-width resonances beyond the Standard Model that decay into a pair of jets is presented. The search is based on 139 fb −1 of proton-proton collisions at $\sqrt{s}$ = 13 TeV recorded during 2015–2018 with the ATLAS detector at the Large Hadron Collider. The analysis is optimized without a particular signal model and aims to be sensitive to a broad range of new physics. It uses two different machine learning strategies to estimate the background in different signal regions. In each region, a weakly supervised classifier is trained to distinguish this background model from data. The analysis focuses on events with high transverse momentum jets reconstructed as large-radius jets. The mass and substructure of these jets are used as inputs to the classifiers. After a classifier-based selection, the distribution of the invariant mass of the two jets is used to search for potential local excesses. The model-independent results of both the anomaly detection methods show no signs of significant local excesses. In addition to model-independent results, a representative set of signal models is injected into the data, and the sensitivity of the methods to these scenarios is reported.
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Aad, G. [Aix-Marseille Université] (ORCID:0000000266654934), Aakvaag, E. [University of Bergen] (ORCID:0000000176161554), Abbott, B. [University of Oklahoma] (ORCID:0000000258882734), Abdelhameed, S. [New York University Abu Dhabi] (ORCID:0000000202875869), Abeling, K. [Georg-August-Universität Göttingen] (ORCID:0000000210021652), Abicht, N. J. [Technische Universität Dortmund] (ORCID:0000000157632760), Abidi, S. H. [Brookhaven National Laboratory] (ORCID:0000000284969294), Aboelela, M. [Southern Methodist University] (ORCID:000900036578220X), Aboulhorma, A. [Université Mohammed V] (ORCID:0000000299872292), Abramowicz, H. [Tel Aviv University] (ORCID:0000000153296640), Abulaiti, Y. [New York University] (ORCID:0000000304033697), Acharya, B. S. [INFN Gruppo Collegato di Udine; ICTP] (ORCID:0000000285889157), Ackermann, A. [Ruprecht-Karls-Universität Heidelberg] (ORCID:0000000346997275), Adam Bourdarios, C. [Université Savoie Mont Blanc] (ORCID:0000000226344958), Adamczyk, L. [AGH University of Krakow] (ORCID:0000000258592075), Addepalli, S. V. [SLAC National Accelerator Laboratory] (ORCID:0000000229196663), Addison, M. J. [University of Manchester] (ORCID:0000000283873661), Adelman, J. [Northern Illinois University] (ORCID:0000000210413496), Adiguzel, A. [Istanbul University] (ORCID:0000000166440517), Adye, T. [Rutherford Appleton Laboratory] (ORCID:0000000306275059), Affolder, A. A. [University of California Santa Cruz] (ORCID:0000000290587217), Afik, Y. [University of Chicago] (ORCID:000000018102356X), Agaras, M. N. [Barcelona Institute of Science and Technology] (ORCID:0000000243555589), Aggarwal, A. [Universität Mainz] (ORCID:0000000219222039), Agheorghiesei, C. [Alexandru Ioan Cuza University of Iasi] (ORCID:0000000336951847), Ahmadov, F. [CERN] (ORCID:000000033644540X), Ahuja, S. [Royal Holloway University of London] (ORCID:0000000343689285), Ai, X. [Zhengzhou University] (ORCID:0000000338562415), Aielli, G. [INFN Sezione di Roma Tor Vergata; Università di Roma Tor Vergata] (ORCID:0000000205738114), Aikot, A. [Centro Mixto Universidad de Valencia - CSIC] (ORCID:0000000165786890), Ait Tamlihat, M. [Université Mohammed V] (ORCID:0000000213224666), Aitbenchikh, B. [Université Hassan II de Casablanca] (ORCID:0000000280201181), Akbiyik, M. [Universität Mainz] (ORCID:0000000273423130), Åkesson, T. P. A. [Lunds universitet] (ORCID:0000000341415408), Akimov, A. V. [Stony Brook University] (ORCID:0000000228462958), Akiyama, D. [Waseda University] (ORCID:0000000176236421), Akolkar, N. N. [Universität Bonn] (ORCID:0000000334242123), Aktas, S. [Bogazici University] (ORCID:0000000282506501), Alberghi, G. L. [INFN Sezione di Bologna] (ORCID:000000032388987X), Albert, J. [University of Victoria] (ORCID:0000000302532505), Albicocco, P. [INFN e Laboratori Nazionali di Frascati] (ORCID:0000000164301038), Albouy, G. L. [Université Grenoble Alpes] (ORCID:0000000308300107), Alderweireldt, S. [University of Edinburgh] (ORCID:0000000282247036), Alegria, Z. L. [Oklahoma State University] (ORCID:0000000219770799), Aleksa, M. [CERN] (ORCID:0000000219369217), Aleksandrov, I. N. [CERN] (ORCID:0000000173816762), Alexa, C. [Horia Hulubei National Institute of Physics and Nuclear Engineering] (ORCID:0000000309227669), Alexopoulos, T. [National Technical University of Athens] (ORCID:000000028977279X), Alfonsi, F. [INFN Sezione di Bologna] (ORCID:0000000209660211), Algren, M. [Université de Genève] (ORCID:0000000317931787), Alhroob, M. [University of Warwick] (ORCID:0000000175697111), Ali, B. [Czech Technical University in Prague] (ORCID:0000000186535556), Ali, H. M. J. [Lancaster University] (ORCID:0000000245077349), Ali, S. [California State University] (ORCID:0000000152163133), Alibocus, S. W. [University of Liverpool] (ORCID:0000000293778852), Aliev, M. [University of Johannesburg] (ORCID:0000000290123746), Alimonti, G. [INFN Sezione di Milano] (ORCID:0000000271289046), Alkakhi, W. [Georg-August-Universität Göttingen] (ORCID:0000000193554245), Allaire, C. [Université Paris-Saclay] (ORCID:000000034745538X), Allbrooke, B. M. M. [University of Sussex] (ORCID:0000000257382471), Allen, J. S. [University of Manchester] (ORCID:0000000193988158), Allen, J. F. [University of Edinburgh] (ORCID:0000000199907486), Allport, P. P. [University of Birmingham] (ORCID:0000000173032570), Aloisio, A. [INFN Sezione di Napoli; Università di Napoli] (ORCID:0000000238836693), Alonso, F. [Universidad Nacional de La Plata and CONICET] (ORCID:0000000194318156), Alpigiani, C. [University of Washington] (ORCID:0000000276415814), Alsolami, Z. M. K. [Lancaster University] (ORCID:0000000237850709), Alvarez Fernandez, A. [Universität Mainz] (ORCID:0000000315254620), Alves Cardoso, M. [Université de Genève] (ORCID:000000020042292X), Alviggi, M. G. [INFN Sezione di Napoli; Università di Napoli] (ORCID:000000030026982X), Aly, M. [University of Manchester] (ORCID:0000000330433715), Amaral Coutinho, Y. [Universidade Federal do Rio De Janeiro COPPE/EE/IF] (ORCID:0000000217987230), Ambler, A. [McGill University] (ORCID:0000000321843480), Amelung, C. [CERN], Amerl, M. [University of Manchester] (ORCID:0000000311557982), Ames, C. G. [Ludwig-Maximilians-Universität München] (ORCID:0000000221264246), Amidei, D. [University of Michigan] (ORCID:0000000268140355), Amini, B. [Albert-Ludwigs-Universität Freiburg] (ORCID:0000000246920369), Amirie, K. [University of Toronto] (ORCID:0000000280297347), Amirkhanov, A. [CERN] (ORCID:0000000154217473), Amor Dos Santos, S. P. [Laboratório de Instrumentação e Física Experimental de Partículas - LIP, Lisboa] (ORCID:0000000175666067), Amos, K. R. [Centro Mixto Universidad de Valencia - CSIC] (ORCID:0000000317575620), Amperiadou, D. [Aristotle University of Thessaloniki] (ORCID:0000000302056887), An, S. [High Energy Accelerator Research Organization], Ananiev, V. [University of Oslo] (ORCID:0000000336497621), Anastopoulos, C. [University of Sheffield] (ORCID:0000000315875830), Andeen, T. [University of Texas at Austin] (ORCID:000000024413871X), Anders, J. K. [University of Liverpool] (ORCID:0000000218460262), Anderson, A. C. [University of Glasgow] (ORCID:0009000996824656), Andreazza, A. [INFN Sezione di Milano; Università di Milano] (ORCID:0000000151615759), Angelidakis, S. [National and Kapodistrian University of Athens] (ORCID:0000000282746118), Angerami, A. [Columbia University] (ORCID:0000000178348750), Anisenkov, A. V. [CERN] (ORCID:0000000272015936), Annovi, A. [INFN Sezione di Pisa] (ORCID:0000000246494398), Antel, C. [Université de Genève] (ORCID:0000000196830890), Antipov, E. [Stony Brook University] (ORCID:0000000266787665), Antonelli, M. [INFN e Laboratori Nazionali di Frascati] (ORCID:0000000222935726), Anulli, F. [INFN Sezione di Roma] (ORCID:000000032734130X), Aoki, M. [High Energy Accelerator Research Organization] (ORCID:0000000174980097), Aoki, T. [University of Tokyo] (ORCID:0000000266185170). 2025-10-22. Weakly supervised anomaly detection for resonant new physics in the dijet final state using proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector. https://doi.org/10.1103/2yq5-vj59
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