Les Houches

• Dijet: only “certain” constraint at the LHC (if we make the DM through a mediator produced through quarks and gluons, then the mediator needs to decay into quarks and gluons). We can use gDM/gSM planes for the combination, see e.g. http://arxiv.org/abs/1503.05916
• Do dilepton resonances need a specific theory and specific assumptions to be considered?
• Can we build a specific mapping between existing theories (e.g. RS gravitons) and DM theories, for spin-2 mediators?

• Is there any particular way of searching for mediators at the LHC that we missed?
• Are there other general possibilities for DM-SM interaction that would produce non-MET signatures, or otherwise not be found by looking for the two-body decay of a mediator?
• By ignoring gauge invariance and other considerations of a full theory, are any of the simplified models missing important, unavoidable details?

• Example #1: mono-EW-boson. How to find a simplified model signal to use as a benchmark, where monojet constraints aren’t dominating? One possible lead: VVChiChi EFT operators from http://arxiv.org/abs/1307.5064 or http://arxiv.org/abs/1501.00907. The completion proceeds through loops so it has not been fully fleshed out. Is there any interest from the theoretical community to develop those models?
• Example #2: is there any Simplified DM models predicting distinctly VBF-like signal kinematics? (vs models corresponding to, say, VVchichi EFT operators)

• what are we missing out on, if we only look for Dirac DM? Side question, why are theorists more interested in that wrt Majorana/scalar/complex scalar/vector?
• what are the implications of the MFV assumption? Alternative way to phrase this question: how do we link better the theory of flavor and DM theories, in a way that we can respect those constraints without necessarily making the MFV assumption as a whole?

Can the monojet pT distribution differentiate among different SM-DM couplings? An enhancement of the signal for large pT occurs if the coupling is proportional to the exchanged momentum; this happens for a derivative coupling.

The SM plus one singlet scalar DM, including a dim-6 operator coupling the Higgs doublet to the DM. A recent reference on this model: http://inspirehep.net/record/1341060?ln=en , see section 3.1.1, in particular eq.(3.3) for the Higgs-DM-DM coupling, if somebody is interested to generate the related pT distribution…

A preliminary study of the monojet signature in this model was performed in the master thesis by Sylvain Lacroix (2013, in French): see section 3.9 for the case without derivative coupling, and section 4.3 for the addition of the derivative operator.