Dark Matter Searches with a Mono-Z' jet
Abstract
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.
Keywords
Cite
@article{arxiv.1504.01395,
title = {Dark Matter Searches with a Mono-Z' jet},
author = {Yang Bai and James Bourbeau and Tongyan Lin},
journal= {arXiv preprint arXiv:1504.01395},
year = {2015}
}
Comments
23 pages, 9 figures; journal version