Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 6: Suche nach dunkler Materie I

T 6.9: Talk

Monday, March 19, 2018, 18:05–18:20, Philo-HS6

Search for Dark Matter in the Mono-Higgs Channel — •Andrea Matic and Jeanette Lorenz — Ludwig-Maximilians-Universität München

Astrophysical measurements show that a significant fraction of the mass-energy density in the universe consists of dark matter (DM). However, the particle nature of DM is still unknown. Dark matter candidates need to be massive particles, which might be weakly interacting. If produced in proton-proton collisions at the LHC, DM particles would not interact with the detector material and the resulting signature would be characterized by high missing transverse energy.

A search for DM is presented, which is based on data taken with the ATLAS detector at a center-of-mass energy of 13 TeV. The channel studied is sensitive to the pair production of DM particles in association with a Higgs boson, which decays further into two b-quarks. Depending on the momentum of the Higgs boson, this decay can have two different signatures: Either two resolved b-jets or one large-radius jet with two b-tagged tracks.

This talk presents the analysis strategy in the mono-Higgs channel and the statistical interpretation of the results.