Dark matter (DM) is currently one of the most striking hints of new physics.
Its existence is suggested by many astrophysical observations, yet the Standard
Model of particle physics does not provide any candidate particle to explain its
abundance in the universe. According to some theoretical models, DM is made
of weakly interacting massive particles with masses at the TeV scale.
This...
If invisible particles are produced at colliders, their information is encoded into the kinematic distributions of visible particles. Although it sounds trivial, the problem is how systematically and efficiently they can be extracted. At least for models with s-channel mediator, we provide simple method and we test it within simplified model as an example.
In this talk, I will discuss the phenomenology of some gauge invariant Higgs portal Dark Matter (DM) models. When DM is fermion, applying the Standard Model (SM) gauge symmetry to simplified DM model will introduce an extra scalar mediator in addition to the SM Higgs. This has two consequences: processes of two scalar mediators will interfere with each other; there will be new signals at...
We consider minimal dark matter scenarios featuring momentum-dependent couplings of the dark sector to the Standard Model. We derive constraints from existing LHC searches in the monojet channel, estimate the future LHC sensitivity for an integrated luminosity of 300 fb−1, and compare with models exhibiting conventional momentum-independent interactions with the dark sector. In addition to...
We consider a concise dark matter (DM) scenario in the context of a non-exotic U(1) extension of the Standard Model (SM), where a new U(1)_X gauge symmetry is introduced along with three generation of right-handed neutrinos (RHNs) and an SM gauge singlet Higgs field. The model is a generalization of the minimal gauged U(1)_B-L (baryon number minus lepton number) extension of the SM, in which...
We study a family of simplified models in which dark matter (DM) interacts with both quarks and leptons through a renormalizable Yukawa interaction with partner fields. The partners are complex scalar fields if DM is fermionic and Dirac fields if DM is scalar. We study how these type of interactions can reshape the spectra of the lepton pair production at the LHC as a function of the...
Models of dark matter which couple to the Standard Model primarily through the top quark are well motivated from theoretical and experimental perspectives. Possible top-philic dark matter models and their motivations will be explored. Ultimately, simplified models which encapsulate the characteristics of interest will be used to examine recent LHC results as well as direct and indirect...
We look at a simplified model for dark matter interacting with quarks mediated by heavy colored scalars. In particular, we study the contribution from dark matter scattering against gluons from the nuclei, which arises at 1-loop. We
determine relevant Wilson coefficients and also analyze the effects of RG Evolution on the same.
We present our preliminary results and identify dominant...
