Constraints on off-shell Higgs boson production and the Higgs boson total width in ℤℤ→ 4ℓ and ℤℤ→ 2ℓ2ѵ final states with the ATLAS detector

Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Constraints on off-shell Higgs boson production and the Higgs boson total width in ℤℤ→ 4ℓ and ℤℤ→ 2ℓ2ѵ final states with the ATLAS detector. Physics letters. B, 786, pp. 223-244. Elsevier 10.1016/j.physletb.2018.09.048

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A measurement of off-shell Higgs boson production in the ℤℤ→ 4ℓ and ℤℤ→ 2ℓ2ѵ decay channels, where ℓ stands for either an electron or a muon, is performed using data from proton–proton collisions at a centre-of-mass energy of √s=13 TeV. The data were collected by the ATLAS experiment in 2015 and 2016 at the Large Hadron Collider, and they correspond to an integrated luminosity of 36.1 fb⁻¹. An observed (expected) upper limit on the off-shell Higgs signal strength, defined as the event yield normalised to the Standard Model prediction, of 3.8 (3.4) is obtained at 95% confidence level (CL). Assuming the ratio of the Higgs boson couplings to the Standard Model predictions is independent of the momentum transfer of the Higgs production mechanism considered in the analysis, a combination with the on-shell signal-strength measurements yields an observed (expected) 95% CL upper limit on the Higgs boson total width of 14.4 (15.2) MeV.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics

ISSN:

0370-2693

Publisher:

Elsevier

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

18 Jun 2019 08:32

Last Modified:

23 Feb 2021 23:46

Publisher DOI:

10.1016/j.physletb.2018.09.048

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt

BORIS DOI:

10.7892/boris.129021

URI:

https://boris.unibe.ch/id/eprint/129021

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