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Search for triple Higgs boson production in the 6b final state using pp collisions at s =13 TeV with the ATLAS detector

Abstract:
A search for the production of three Higgs bosons (HHH) in the bb¯bb¯bb¯ final state is presented. The search uses 126 fb−1 of proton-proton collision data at s√=13 TeV collected with the ATLAS detector at the Large Hadron Collider. The analysis targets both non-resonant and resonant production of HHH. The resonant interpretations primarily consider a cascade decay topology of X→SH→HHH with masses of the new scalars X and S up to 1.5 TeV and 1 TeV, respectively. In addition to scenarios where S is off-shell, the non-resonant interpretation includes a search for standard model (SM) HHH production, with limits on the tri-linear and quartic Higgs self-coupling set. No evidence for HHH production is observed. An upper limit of 59 fb is set, at 95% confidence level, on the cross-section for Standard-Model HHH production.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevD.111.032006

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Role:
Author
ORCID:
0000-0001-7021-3720
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Role:
Author
ORCID:
0000-0003-3562-9944

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Role:
Contributor


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Funder identifier:
https://ror.org/057g20z61
Grant:
ST/W000628/1


Publisher:
American Physical Society
Journal:
Physical Review D: Particles, Fields, Gravitation and Cosmology More from this journal
Volume:
111
Article number:
032006
Publication date:
2025-02-13
Acceptance date:
2024-12-23
DOI:
EISSN:
2470-0029
ISSN:
2470-0010


Language:
English
Keywords:
Pubs id:
2077129
Local pid:
pubs:2077129
Deposit date:
2025-01-10

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