Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 99: Dark Matter IV

T 99.1: Vortrag

Freitag, 3. April 2020, 11:00–11:15, H-HS XIV

Search for dark matter produced in association with a hypothetical dark Higgs boson with the ATLAS detector — •Philipp Gadow, Sandra Kortner, and Hubert Kroha — Max-Planck-Institut für Physik, München, Deutschland

Searches for particle dark matter produced in association with a hypothetical dark Higgs boson are performed using the Run-2 proton-proton collision data recorded with the ATLAS detector. The presence of such a dark Higgs boson is motivated both by the need of a generation mechanism for the mass of dark matter particles and by the need of relaxing constraints on models of dark matter production due to the observed dark matter relic abundance. The dark Higgs boson mixing with the Standard Model Higgs boson allows to probe visible dark Higgs boson decays to b-quarks or pairs of vector bosons. Dark Higgs candidates are reconstructed as jets of hadronic activity enhanced by tracking information, allowing to exploit precision jet substructure information to identify dark Higgs decays. This contribution discusses constraints on dark Higgs models placed by searches exploring signatures of missing transverse momentum due to the invisible dark matter particles and dark Higgs decays to either b-quarks or pairs of W bosons. The signature of missing transverse momentum and a pair of resonantly produced W bosons is explored for the first time at the Large Hadron Collider.

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