Mono-W Dark Matter Signals at the LHC: Simplified Model Analysis
Abstract
We study mono-W signals of dark matter (DM) production at the LHC, in the context of gauge invariant renormalizable models. We analyze two simplified models, one involving an s-channel Z' mediator and the other a t-channel colored scalar mediator, and consider examples in which the DM-quark couplings are either isospin conserving or isospin violating after electroweak symmetry breaking. While previous work on mono-W signals have focused on isospin violating EFTs, obtaining very strong limits, we find that isospin violating effects are small once such physics is embedded into a gauge invariant simplified model. We thus find that the 8 TeV mono-W results are much less constraining than those arising from mono-jet searches. Considering both the leptonic (mono-lepton) and hadronic (mono fat jet) decays of the W, we determine the 14 TeV LHC reach of the mono-W searches with 3000 fb of data. While a mono-W signal would provide an important complement to a mono-jet discovery channel, existing constraints on these models imply it will be a challenging signal to observe at the 14 TeV LHC.
Keywords
Cite
@article{arxiv.1512.00476,
title = {Mono-W Dark Matter Signals at the LHC: Simplified Model Analysis},
author = {Nicole F. Bell and Yi Cai and Rebecca K. Leane},
journal= {arXiv preprint arXiv:1512.00476},
year = {2016}
}
Comments
19 pages, 8 figures