Updated HET Seminar

"Capturing Higgs Boson Decays to Light Jets at LHC"

Presented by Linda Carpenter, Ohio State University

Wednesday, November 8, 2017, 2:00 pm — Small Seminar Room, Bldg. 510

Though the Higgs has a non trivial branching fraction -8 percent, to light jets, this is a very hard channel to directly capture with the LHC. We study the Higgs boson (h ) decay to two light jets at the 14 TeV High-Luminosity-LHC (HL-LHC), where a light jet (j ) represents any nonflavor-tagged jet from the observational point of view. The decay mode Higgs to gluons is chosen as the benchmark since it is the dominant channel in the Standard Model, but the bound obtained is also applicable to the light quarks. We estimate the achievable bounds on the decay branching fractions through the associated production V h (V =W±,Z ). Events of the Higgs boson decaying into heavy (tagged) or light (untagged) jets are correlatively analyzed. We find that with 3000 fb-1 data at the HL-LHC corresponds to a reachable upper bound of a few times the SM prediction. Which can ten be turned into a bound on the Higgs couplings to gluons and light quark flavors. A consistency fit also leads to an upper bound on the Higgs to charm coupling. The estimated bound may be further strengthened by adopting multiple variable analyses or adding other production channels.

Hosted by: Christopher Murphy

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