Speaker
Description
A hypothetical dark Higgs boson was proposed in a dark matter (DM) model to explain the origin of mass in dark sector as well as to open up new annihilation channel relaxing the DM relic density constraint from cosmological observation. The search focusing on Majorana DM produced with a low mass dark Higgs boson decaying to two b-quarks is proposed and working in progress using the 139fb-1 of proton-proton collision data collected with ATLAS detector at √s=13 TeV.
The event selection and categorization are optimized based on the varying dark Higgs mass. Advanced jet clustering and boosted tagging techniques are applied to achieve higher efficiency and better signal over background ratio.
The analysis method and model interpretation strategy together with the result of expected sensitivity will be presented.
| Career stage | Graduate student |
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