Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 33: Higgs II

T 33.4: Talk

Tuesday, March 20, 2018, 17:15–17:30, Z6 - HS 0.004

Search for the H → bb and H → cc decay — •Elisabeth Schopf, Tatjana Lenz, and Norbert Wermes — Physikalisches Institut, Nussallee 12, 53115 Bonn

Since the discovery of the Higgs boson in 2012 many of its properties have been mainly measured in bosonic final states. The measurement of the Higgs boson couplings to fermions is still a very challenging task. The Higgs boson decay to bottom quarks has the largest branching ratio of 58%, but was not discovered yet. A measurement of the couplings to lighter, second generation fermions is even more difficult given smaller branching ratios and the overhelming amount of background events.

I will present an evidence for the H → bb decay in the (W/Z)H production channel. This result was obtained with 36.1 fb⁻¹ of LHC data collected by the ATLAS experiment. Furthermore I will present a novel search for the H → cc decay using the same data set. I will discuss the challenges of this decay channel, such as the identification of c-jets and the suppression of background processes.