Speaker
Mr
Xolani Mapekula
(University of Johannesburg)
Description
A search is described for a new boson that lies beyond the standard model is conducted where the progenitor 125 GeV Higgs Boson decays ultimately to four leptons (electrons or muons). The Higgs boson provides a portal into the hidden sector, which contains dark particles. The processes under consideration include H → ZX→ 4l and H → XX → 4l where X is the dark vector boson Zd or the pseudoscalar boson <it>a</it>, which are part of the two benchmark models used in the analysis. The mass range under consideration for the dark vector boson or the pseudoscalar boson are 1 < X < 60 GeV. The data under analysis is collected from p-p collisions at the LHC from the ATLAS detector using a centre of mass energy of √s=14 TeV with an integrated luminosity of 36-1 fb. Upper limits at the 95% confidence level are imposed on the fiducial cross sections for the processes under consideration. The subsequent work considers relaxing the Higgs Boson mass constraint upwards, introducing improved filtering and also improvements in the background estimation.
Supervisor details<br><b>If not a student, type N/A.</b><br>Student abstract submision<br>requires supervisor permission:<br>please give their name,<br> institution and email address.
SH Connell, UJ, shconnell@uj.ac.za
| Please confirm that you<br>have carefully read the<br>abstract submission instructions<br>under the menu item<br>"Call for Abstracts"<br><b>(Yes / No)</b> | Yes |
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| Consideration for<br>student awards<br><b>Choose one option<br>from those below.</b><br>N/A<br>Hons<br>MSc<br>PhD | MSc |
Primary author
Mr
Xolani Mapekula
(University of Johannesburg)
