Wei, Yingjie (2024) Evidence of the off-shell Higgs and Higgs decay width constraints at ATLAS. Il nuovo cimento C, 47 (1). pp. 1-6. ISSN 1826-9885
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Abstract
This paper reports a search for off-shell Higgs boson production and the measurement of the Higgs decay width using the full Run-2 pp collision dataset, corresponding to an integrated luminosity of 139 fb−1, collected by the ATLAS detector at the Large Hadron Collider. In this analysis, the Higgs boson production modes include gluon-gluon fusion, vector-boson fusion, and VH, while the Higgs boson decay channels ZZ → 4l and Z'Z → 22ν (l = e or μ) are considered. The background-only hypothesis is rejected at the confidence level of 3.3 σ (2.2 σ) for the observed (expected) result, providing evidence of the off-shell Higgs boson. The combination of the off-shell and on-shell Higgs boson measurements can constrain the Higgs decay width to be 4.5+3.3−2.5 MeV, with an upper limit of 10.5 MeV at the 95% confidence level.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 11 Dec 2023 03:00 |
| Last Modified: | 11 Dec 2023 03:00 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/22556 |
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