Constraints on off-shell Higgs boson production and the Higgs boson total width in ZZ → 4ℓ and ZZ  → 2ℓ2final states with the ATLAS detector

ATLAS Collaboration, Paul Newman

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)
99 Downloads (Pure)

Abstract

A measurement of off-shell Higgs boson production in the $ZZ\to4\ell$ and $ZZ\to2\ell2\nu$ decay channels, where $\ell$ stands for either an electron or a muon, is performed using data from proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13$ 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.
Original languageEnglish
Pages (from-to)223-244
JournalPhysical Review Letters
Volume786
Early online date26 Sep 2018
DOIs
Publication statusPublished - 10 Nov 2018

Bibliographical note

38 pages in total, author list starting page 22, 3 figures, 3 tables, submitted to Phys. Lett. B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2017-06/

Keywords

  • hep-ex

Fingerprint

Dive into the research topics of 'Constraints on off-shell Higgs boson production and the Higgs boson total width in ZZ → 4ℓ and ZZ  → 2ℓ2final states with the ATLAS detector'. Together they form a unique fingerprint.

Cite this