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Past Events
Hunting for Dark Matter with Boosted Higgs Bosons in ATLAS
| Speaker: | Prof. Shih-Chieh Hsu |
| Affiliation: | Department of Physics, University of Washington Seattle |
| Date: | January 16, 2018 (Tuesday) |
| Time: | 4:30 p.m. |
| Venue: | Room 522, 5/F, Chong Yuet Ming Physics Building, HKU |
Abstract
Although dark matter (DM) contributes a large component of the mass-energy of the universe, its properties and interactions with known particles remain unknown. In light of this unsolved puzzle, searches for DM pair-produced at Large Hadron Collider (LHC) provide important information complementary to direct and indirect searches in order to determine whether a signal observed experimentally indeed stems from DM. In this presentation, I will report the latest search results of DM pair production in association with a Higgs boson using the LHC Run2 data (sqrt(s)=13 TeV) collected by the ATLAS detector. I'll demonstrate the improvement of the analysis using the state-of-the-art boosted Higgs boson techniques. Because the observed data are found to be consistent with the expected Standard Model backgrounds, I'll show results interpreted using Z'-2HDM simplified models with the most stringent limits. Finally, I will discuss the prospects of this search in the coming LHC Run2 and new ideas of the boosted Higgs tagging.
Anyone interested is welcome to attend.