Conveners
DM I
- Ahmed Ismail
Searches in CMS for dark matter particles, mediators, and dark sector extensions will be presented. Various final states, topologies, and kinematic variables are explored utilizing the full Run-II data-set collected at the LHC.
The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. The ATLAS experiment has developed a broad search program for DM candidates, including resonance searches for the mediator which would couple DM to the SM,...
If the dark sector contains multiple components with similar quantum numbers which communicate with the visible sector only through a mediator, then this mediator also generically gives rise to dark-sector decays, with heavier dark components decaying to lighter ones. Successive such decays lead to extended decay chains in which visible matter is also produced at every decay step. In this...
In this paper, we point out a novel signature of physics beyond the Standard Model which could potentially be observed both at the High-Luminosity LHC (HL-LHC) and at future colliders. We call such a signature a "tumbler." In this talk, I discuss the prospects for observing tumbler signatures at the HL-LHC, taking into account the enhanced timing capabilities afforded by the upgraded LHC...
The dark matter WIMP proposed here has the following properties: (1) According to a rigorous theorem, its mass is $\le 125$ GeV. (2) According to approximate calculations of its annihilation cross-section, it will yield the observed dark matter abundance if its mass is $\sim$ 75 GeV. We also estimate that (3) the cross-section for nuclear scattering is consistent with the limits from direct...
Limitations on the most general mono-X Dark Matter signature at colliders motivate searches beyond this, such as multilepton plus missing energy signatures. In this talk I present our latest limits on the inert 2-Higgs Doublet model (I2HDM) and Minimal Fermion Dark Matter model (MFDM) for 8/13 TeV pp collisions at the LHC, producing 2-3 leptons plus missing energy final states, using...
We consider an effective field theory framework with three standard model (SM) gauge singlet right handed neutrinos, and an additional SM gauge singlet scalar field. The framework successfully generates eV masses of the light neutrinos via seesaw mechanism, and accommodates a feebly interacting massive particle (FIMP) as dark matter candidate. Two of the gauge singlet neutrinos participate...
