63^rd ANNUAL CONFERENCE OF THE SA INSTITUTE OF PHYSICS

The \textbf{{\textbf{ $H \to h h, S h, S S\to 4W\to 4\ell + 4\nu$} analysis with the ATLAS detector: optimization and prospects for the full Run-2 data}}

26 Jun 2018, 15:00

2h

Poster Presentation Track B - Nuclear, Particle and Radiation Physics Poster Session 1

Speaker

Mr Lehumo Mashishi (Wits)

Description

The $H \to h h, S h, S S\to 4W\to 4\ell + 4\nu$ analysis using \ensuremath{36.1 fb^{-1}} of $pp$ collision data at a center-of-mass energy of 13~TeV recorded with the ATLAS detector at the Large Hadron Collider is presented. The analysis introduces the new Higgs-like scalar, $S$, as well as the Standerd Model Higgs boson, $h$, through the decay of the heavy scalar, $H$. The search is characterized by four lepton and missing transverse momentum carried out by the neutrinos in the final state. This is a very clean signature with low expected background. The analysis strategy relies on the invariant mass of the four leptons and also uses dilepton kinematics to reject $ZZ$ background. The paper discusses the published results with \ensuremath{36.1 fb^{-1}} of the Run-2 data. The analysis optimization and also the prospects for the full Run-2 data are also presented.

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.

Prof Bruce Mellado, University of Witwatersrand, Bruce.Mellado@Wits.ac.za