Light dark matter and Z′ dark force at colliders

By H. An, X. Ji, Lian-tao Wang. 2012

136 citations recorded by the source corpus.

A bstractLight DM, < 10 GeV, with sizeable direct detection rate is an interesting and less explored scenario. Collider searches can be very powerful, such as through the channel in which a pair of dark matter particle is produced in association with a jet. It is a generic possibility that the mediator of the interaction between dark matter and the nucleus will also be accessible at the Tevatron and the LHC. Therefore, collider search of the mediator can provide a more comprehensive probe of the dark matter and its interactions. In this article, to demonstrate the complementarity of these two approaches, we focus on the possibility of the mediator being a new U(1)′ gauge boson, which is probably the simplest model which allows a large direct detection cross section for a light dark matter candidate. We combine searches in the monojet + MET channel and dijet resonance search for the mediator. We find that for the mass of Z′ between 250 GeV and 4 TeV, resonance searches at the colliders provide stronger constraints on this model than the monojet + MET searches.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e9d23386c2f19286833da1392b09f860b7f9edaf

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Citations in the corpus

The dark Z′ portal: direct, indirect and collider searches (2013, unknown): “v is the velocity of DM in the lab frame, Mn is the nucleon mass and ∆Σ is defined as 〈N | ∑ q q̄γμγ5q|N〉 = ∆ΣŪNγμγ5UN , with UN as the wave function of the nucleon [50].”
Constraining dark sectors with monojets and dijets (2015, background): “Even if both couplings arise from a new gauge group, the respective charges and hence the resulting couplings could easily differ by a factor of a few [44, 45].”
Benchmarks for dark matter searches at the LHC (2014, background): “This has motivated new and more model-independent strategies for DM searches at colliders, and led to a vast literature on the subject [1–88].”
Beyond effective field theory for dark matter searches at the LHC (2013, background): “Simplified models of vector mediators have also been discussed in [4, 18, 31, 43, 44].”
Characterising dark matter searches at colliders and direct detection experiments: vector mediators (2014, unknown): “As has been discussed in the literature [11, 12, 32], the mediator width Γmed plays an important role in mono-jet searches.”
On the validity of the effective field theory for dark matter searches at the LHC part III: analysis for the t-channel (2013, background): “[7, 21, 29–35]), especially in the perspective of analysing the data from the future LHC run at (13-14) TeV.”