Hadronic Decays of the Higgs Boson: Lessons from the LHC Run 1 and Prospects

When: Monday, December 02, 2013 at 4:00 pm
Where: DA 114
Speaker: David Lopez Mateos
Organization: Harvard University
Sponsor: High Energy Seminar

Hadronic decays of the Standard Model Higgs, primarily to a pair of b-quarks, happen in the majority of events in which a Higgs boson is produced at the LHC. While the overwhelming QCD backgrounds make these channels suboptimal for discovery, they become essential for the measurement of the associated production of the Higgs with other SM particles, vector bosons and top, in particular. Associated production channels represent the only direct probe into some of the largest couplings of the Higgs.

In this talk, the challenges involved in the reconstruction of hadronic decays of the Higgs will be discussed, together with the state-of-the-art techniques developed by ATLAS in this context. The latest results for associated Higgs production with the Higgs decaying to a b-quark pair using the full Run 1 data collected in ATLAS will be presented. Prospects for Run 2 will be discussed, including new techniques that will provide the sensitivity required to perform the first sensitive direct measurement of the couplings of the Higgs to bottom and top quarks.

Host: Assistant Professor Toyoko Orimoto