Abstract
A search for decays of the Higgs boson into a pair of new spin-zero particles, H→aa, where the a-bosons decay into a b-quark pair and a muon pair, is presented. The search uses 36.1 fb−1 of proton–proton collision data at√s=13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. No significant deviation from the Standard Model prediction is observed. Upper limits at 95% confidence level are placed on the branching ratio (σH/σSM)×B(H→aa→bbμμ), ranging from 1.2×10−4 to 8.4×10−4 in the a-boson mass range of 20–60 GeV.Model-independent limits are set on the visible production cross-section times the branching ratio to the bbμμ final state for new physics, σv is (X)×B(X→bbμμ),ranging from 0.1 fb to 0.73 fb for mμμ between 18 and 62 GeV
Original language | English |
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Pages (from-to) | 1-21 |
Number of pages | 21 |
Journal | Physics Letters B |
Volume | 790 |
Early online date | 21 Dec 2018 |
DOIs | |
Publication status | Published - 10 Mar 2019 |
Bibliographical note
36 pages in total, author list starting page 20, 6 figures, 2 tables, submitted to Phys. Lett. B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2016-03/Keywords
- hep-ex
ASJC Scopus subject areas
- Nuclear and High Energy Physics