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Search for new physics in final states with semivisible jets or anomalous signatures using the ATLAS detector

Publication ,  Journal Article
Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K; Abicht, NJ; Abidi, SH; Aboelela, M; Aboulhorma, A; Abramowicz, H; Abulaiti, Y ...
Published in: Physical Review D
July 25, 2025

A search is presented for hadronic signatures of beyond the Standard Model (BSM) physics, with an emphasis on signatures of a strongly coupled hidden dark sector accessed via resonant production of a mediator. The ATLAS experiment dataset collected at the Large Hadron Collider from 2015 to 2018 is used, consisting of proton-proton collisions at and corresponding to an integrated luminosity of . The mediator is considered to decay to two dark quarks, which each hadronize and decay to showers containing both dark and Standard Model particles, producing a topology of interacting and noninteracting particles within a jet known as “semivisible.” Machine learning methods are used to select these dark showers and reject the dominant background of mismeasured multijet events, including an anomaly detection approach to preserve broad sensitivity to a variety of BSM topologies. A resonance search is performed by fitting the transverse mass spectrum based on a functional form background estimation. No significant excess over the expected background is observed. Results are presented as limits on the production cross section of semivisible jet signals, parametrized by the fraction of invisible particles in the decay and the mass, and by quantifying the significance of any generic Gaussian-shaped mass peak in the anomaly region.

Duke Scholars

Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

July 25, 2025

Volume

112

Issue

1

Publisher

American Physical Society (APS)
 

Citation

APA
Chicago
ICMJE
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Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. J., … Cobal, M. (2025). Search for new physics in final states with semivisible jets or anomalous signatures using the ATLAS detector. Physical Review D, 112(1). https://doi.org/10.1103/44zp-mh1q
Aad, G., E. Aakvaag, B. Abbott, S. Abdelhameed, K. Abeling, N. J. Abicht, S. H. Abidi, et al. “Search for new physics in final states with semivisible jets or anomalous signatures using the ATLAS detector.” Physical Review D 112, no. 1 (July 25, 2025). https://doi.org/10.1103/44zp-mh1q.
Aad G, Aakvaag E, Abbott B, Abdelhameed S, Abeling K, Abicht NJ, et al. Search for new physics in final states with semivisible jets or anomalous signatures using the ATLAS detector. Physical Review D. 2025 Jul 25;112(1).
Aad, G., et al. “Search for new physics in final states with semivisible jets or anomalous signatures using the ATLAS detector.” Physical Review D, vol. 112, no. 1, American Physical Society (APS), July 2025. Crossref, doi:10.1103/44zp-mh1q.
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Search for new physics in final states with semivisible jets or anomalous signatures using the ATLAS detector. Physical Review D. American Physical Society (APS); 2025 Jul 25;112(1).

Published In

Physical Review D

DOI

EISSN

2470-0029

ISSN

2470-0010

Publication Date

July 25, 2025

Volume

112

Issue

1

Publisher

American Physical Society (APS)