ATLAS searches for additional scalars and exotic Higgs boson decays with the LHC Run 2 dataset

The ATLAS Collaboration

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Abstract

This report reviews the published results of searches for possible additional scalar particles and exotic decays of the Higgs boson performed by the ATLAS Collaboration using up to 140 fb−1 of 13 TeV proton–proton collision data collected during Run 2 of the Large Hadron Collider. Key results are examined, and observed excesses, while never statistically compelling, are noted. Constraints are placed on parameters of several models which extend the Standard Model, for example by adding one or more singlet or doublet fields, or offering exotic Higgs boson decay channels. Summaries of new searches as well as extensions of previous searches are discussed. These new results have a wider reach or attain stronger exclusion limits. New experimental techniques that were developed for these searches are highlighted. Search channels which have not yet been examined are also listed, as these provide insight into possible future areas of exploration.

Original languageEnglish
Pages (from-to)184-260
Number of pages77
JournalPhysics Reports
Volume1116
DOIs
Publication statusPublished - 22 Apr 2025
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2024. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • ATLAS
  • LHC
  • Exotic scalars
  • Exotic Higgses

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