Szczegóły publikacji
Opis bibliograficzny
Search for Higgs boson decays into a $Z$ boson and a light hadronically decaying resonance in $pp$ collisions at $\sqrt{s}$=13 TeV with the ATLAS detector / G. Aad, [et al.], L. ADAMCZYK, [et al.], P. BALEK, [et al.], T. BOŁD, [et al.], K. M. CIEŚLA, [et al.], W. DĄBROWSKI, [et al.], K. DOMIJAN, [et al.], M. DYNDAŁ, [et al.], A. K. GILBERT, [et al.], I. GRABOWSKA-BOŁD, [et al.], S. KOPERNY, [et al.], K. MAJ, [et al.], B. MINDUR, [et al.], P. MOSZKOWICZ, [et al.], P. A. POTĘPA, [et al.], M. PRZYBYCIEŃ, [et al.] // Physics Letters . B ; ISSN 0370-2693. — 2025 — vol. 868 art. no. 139671, s. 1–24. — Bibliogr. s. 8–9, Abstr. — Publikacja dostępna online od: 2025-06-26
Autorzy (2923)
Dane bibliometryczne
| ID BaDAP | 161338 |
|---|---|
| Data dodania do BaDAP | 2025-07-25 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.physletb.2025.139671 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physics Letters, B |
Abstract
A search for decays of the Higgs boson into a ZZ boson and a light resonance, with a mass of 0.5-3.5 GeV, is performed using the full 140 fb−1−1 dataset of 13 TeV proton-proton collisions recorded by the ATLAS detector during Run~2 of the LHC. Leptonic decays of the ZZ boson and hadronic decays of the light resonance are considered. The resonance can be interpreted as a J/ψJ/ψ or ηcηc meson, an axion-like particle, or a light pseudoscalar in two-Higgs-doublet models. Due to its low mass, it would be produced with high boost and reconstructed as a single small-radius jet of hadrons. A neural network is used to correct the Monte Carlo simulation of the background in a data-driven way. Two additional neural networks are used to distinguish signal from background. A binned profile-likelihood fit is performed on the final-state invariant mass distribution. No significant excess of events relative to the expected background is observed, and upper limits at 95% confidence level are set on the Higgs boson's branching fraction to a ZZ boson and a light resonance. The exclusion limit is 10% for the lower masses, and increases for higher masses. Upper limits on the effective coupling CZHeff/ΛCZHeff/Λ of an axion-like particle to a Higgs boson and ZZ boson are also set at 95% confidence level, and range from 0.9 to 2 TeV−1−1.
