SMuK 2023 – scientific programme

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T: Fachverband Teilchenphysik

T 30: Higgs Charm, Di-Higgs

T 30.3: Talk

Tuesday, March 21, 2023, 17:30–17:45, HSZ/0105

Search for boosted Higgs boson decays to a charm quark pairs — •Andrzej Novak, Xavier Coubez, Ming-Yan Lee, Luca Mastrolorenzo, Andrey Pozdnyakov, Annika Stein, and Alexander Schmidt — Physics Institute III A, RWTH Aachen

The Higgs boson decay to charm quarks (H → cc) has the highest branching fraction of the yet unobserved decays. Moreover, it is predicted to be the strongest coupling to the second generation of fermions, which as of now remains unconfirmed. This talk presents a recent search by the CMS experiment for H → cc at high transverse momentum, primarily targeting the gluon fusion production mode. The method is validated with the Z → cc decay, which is observed for the first time in this channel and provides the strongest constraint yet at the LHC. The observed (expected) upper limit on H → cc process is set at 47 (39) times the SM prediction. The analysis was enabled by recent developments in deep learning tools for jet identification in such topologies.