Abstract
This document outlines a set of simplified models for dark matter and its interactions with Standard Model particles. It is intended to summarize the main characteristics that these simplified models have when applied to dark matter searches at the LHC, and to provide a number of useful expressions for reference. The list of models includes both s-channel and t-channel scenarios. For s-channel, spin-0 and spin-1 mediation is discussed, and also realizations where the Higgs particle provides a portal between the dark and visible sectors. The guiding principles underpinning the proposed simplified models are spelled out, and some suggestions for implementation are presented.
Highlights
Gravitational effects on astrophysical scales give convincing evidence for the presence of dark matter (DM) in Nature, an observation that is strongly supported by the large-scale structure of the Universe and measurements of the cosmic microwave background [1]
For a simplified DM model to be useful at the LHC, it should fulfill the following three criteria: (i) it should be simple enough to form a credible unit within a more complicated model; (ii) it should be complete enough to be able to describe accurately the relevant physics phenomena at the energies that can be probed at the LHC; (iii) by construction it should satisfy all non high-pT
Which implies that for ∆V ' 1 the Z 0 -boson mass MZ 0 should be larger than around 3 × 104 TeV, because otherwise one would be in conflict with the experimental bounds on kaon mixing. In view of this result it should be clear that in order to allow for interesting LHC phenomenology, one has to require that the simplified model is Minimal Flavor Violation (MFV)
Summary
Gravitational effects on astrophysical scales give convincing evidence for the presence of dark matter (DM) in Nature, an observation that is strongly supported by the large-scale structure of the Universe and measurements of the cosmic microwave background [1]. (II) The large energies accessible at the LHC call into question the momentum expansion underlying the EFT approximation [6, 10, 11, 12, 13, 14, 15, 16, 17], and we can expand our level of detail toward simplified DM models (for early proposals see for example [18, 19, 20, 21, 22, 23]) Such models are characterized by the most important state mediating the DM particle interactions with the SM, as well as the DM particle itself.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
