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, σvis(X) × B(X → bbμμ), ranging from 0.1 fb to 0.73 fb for mμμ between 18 and 62 GeV.
Description
This work is licensed under a Creative Commons Attribution 4.0 International License.
Citation
M. Aaboud et al., "Search for Higgs boson decays into a pair of light bosons in the bbμμ final state in pp collision at s=13TeV with the ATLAS detector", Physics Letters B, Volume 790, 2019, Pages 1 21, ISSN 0370-2693, https://doi.org/10.1016/j.physletb.2018.10.073. (http://www.sciencedirect.com/science/article/pii/S0370269318309717)