Constraining dark sectors with monojets and dijets

By M. Chala, Felix Kahlhoefer, Matthew McCullough, G. Nardini, K. Schmidt-Hoberg. 2015

168 citations recorded by the source corpus.

A bstractWe consider dark sector particles (DSPs) that obtain sizeable interactions with Standard Model fermions from a new mediator. While these particles can avoid observation in direct detection experiments, they are strongly constrained by LHC measurements. We demonstrate that there is an important complementarity between searches for DSP production and searches for the mediator itself, in particular bounds on (broad) dijet resonances. This observation is crucial not only in the case where the DSP is all of the dark matter but whenever — precisely due to its sizeable interactions with the visible sector — the DSP annihilates away so efficiently that it only forms a dark matter subcomponent. To highlight the different roles of DSP direct detection and LHC monojet and dijet searches, as well as perturbativity constraints, we first analyse the exemplary case of an axial-vector mediator and then generalise our results. We find important implications for the interpretation of LHC dark matter searches in terms of simplified models.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/8e3c6f6bb5238d721ac7a9a57e4cc91ede444c55

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Citations in the corpus

Recommendations on presenting LHC searches for missing transverse energy signals using simplified s-channel models of dark matter (2016, background): “However, it is also a possibility that the DM particle probed by non-collider experiments constitutes only a certain component of the DM density, so their results would have to be rescaled accordingly (see for instance [31]).”
Search for Dijet Resonances in Proton–proton Collisions at √s = 13 TeV and Constraints on Dark Matter and Other Models (2017, background): “This mediator can decay to either a pair of DM particles or a pair of jets and therefore can be observed as a dijet resonance [1].”
Implications of unitarity and gauge invariance for simplified dark matter models (2015, methodology): “[26] assumes a Dirac DM particle, while we focus on Majorana DM.”
Search for narrow and broad dijet resonances in proton-proton collisions at $\sqrt{s}=$ 13 TeV and constraints on dark matter mediators and other new particles (2018, background): “For example, in a model in which dark matter (DM) particles couple to quarks through a DM mediator, the mediator can decay to either a pair of DM particles or a pair of jets and therefore can be observed as a dijet resonance [1, 2] that is either narrow or broad, depending on the strength of the cou”