Speaker
Mr
Phineas Ntsoele
(University of Johannesburg)
Description
The Standard Model (SM) is known to be incomplete (it cannot explain dark matter, dark energy, gravitational waves, matter-antimatter asymmetry, etc). The introduction of a Dark Sector via an additional U(1)D gauge symmetry added to the SM Lagrangian could be the long-awaited solution. In this model there is a dark vector boson Zd which can mix with the SM hypercharge gauge boson. This opens the Hypercharge Portal which can mediate the fluctuation of a Z to a Zd, or the decay of the Zd to SM leptons. If a dark Higgs singlet also exists, this then breaks the U(1)D, opening the Higgs portal and also allowing for Higgs mass mixing between the SM and dark sectors. Including dark fermionic fields in the Lagrangian allows for long-lived cold Dark Matter candidates. The various connections between the Dark and SM sectors allow descriptions of many key astro-physical phenomena. The Model is therefore a fascinating candidate for new physics beyond the SM. It becomes crucial to search for experimental signatures of this model. This contribution discusses a search for the dark force boson Zd using its production via the Higgs Portal and its decay back to SM leptons: H → hd→ ZdZd → 4l.
Main supervisor (name and email)<br>and his / her institution
SH Connell
University of Johannesburg
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
MSc
Apply to be<br> considered for a student <br> award (Yes / No)?
yes
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
yes
Primary author
Mr
Phineas Ntsoele
(University of Johannesburg)
Co-author
ATLAS Collaboration
(University of Johannesburg)
