Aaboud, M;
Aad, G;
Abbott, B;
Abdinov, O;
Abeloos, B;
Abhayasinghe, DK;
Abidi, SH;
... Arabidze, G; + view all
(2018)
Search for the Higgs Boson Produced in Association With a Vector Boson and Decaying Into Two Spin-zero Particles in the H → Aa → 4b Channel in Pp Collisions at S√=13 Tev With the Atlas Detector.
Journal of High Energy Physics
, 2018
, Article 31. 10.1007/JHEP10(2018)031.
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Abstract
A search for exotic decays of the Higgs boson into a pair of spin-zero particles, H → aa, where the a-boson decay sin to b-quarks promptly or with a mean proper lifetime cτaup to 6 mm and has a mass in the range of 20–60 GeV, is presented. The search is performed in events where the Higgs boson is produced in association with a W or Z boson, giving rise to a signature of one or two charged leptons (electrons or muons) and multiple jets from b-quark decays. The analysis is based on the dataset of proton-proton collisions at s=13 TeV recorded in 2015 and 2016 by the ATLAS detector at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 36.1 fb−1. No significant excess of events above the Standard Model background prediction is observed, and 95% confidence-level upper limits are derived for the production cross-sections for pp → WH, ZH and their combination, times the branching ratio of the decay chain H → aa → 4b. For a-bosons which decay promptly, the upper limit on the combination of cross-sections for WH and ZH times the branching ratio of H → aa → 4b ranges from 3.0 pb for ma= 20 GeV to 1.3 pb for ma= 60 GeV, assuming that the ratio of WH to ZH cross-sections follows the Standard Model prediction. For a-bosons with longer proper lifetimes, the most stringent limits are 1.8 pb and 0.68 pb, respectively, at cτa∼ 0.4 mm.[Figure not available: see fulltext.].
| Type: | Article |
|---|---|
| Title: | Search for the Higgs Boson Produced in Association With a Vector Boson and Decaying Into Two Spin-zero Particles in the H → Aa → 4b Channel in Pp Collisions at S√=13 Tev With the Atlas Detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/JHEP10(2018)031 |
| Publisher version: | https://doi.org/10.1007/JHEP10(2018)031 |
| Language: | English |
| Additional information: | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Beyond Standard Model, Hadron-Hadron scattering (experiments), Higgs physics |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10059800 |
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