Speaker
James Bourbeau
(University of Wisconsin)
Description
We study collider signatures of a class of dark matter models with a GeV-scale dark
Z'. At hadron colliders, the production of dark matter particles naturally leads to associated production of the Z', which can appear as a narrow jet after it decays hadronically. Contrary to the usual mono-jet signal from initial state radiation, the final state radiation of dark matter can generate the signature of a mono-Z' jet plus missing transverse energy. Performing a jet-substructure analysis to tag the Z' jet, we show that these Z' jets can be distinguished from QCD jets at high significance. Compared to mono-jets, a dedicated search for mono-Z' jet events can lead to over an order of magnitude stronger bounds on the interpreted dark matter-nucleon scattering cross sections.
Authors
James Bourbeau
(University of Wisconsin)
Tongyan Lin
(University of Chicago)
Yang Bai
(University of Wisconsin)
