The production of the heavy scalar H in association with top and anti-top quarks

Abstract

Following arXiv:1506.00612, an effective field theory approach has been introduced for two additional real scalars, $H$ and $\ddot{I}‡$, to study the associated Higgs boson ($h$) production with top quarks at the Large Hadron Collider with centre of mass energy $\sqrt{s}=8$ TeV. In all studies, one benchmark scenario is considered where the parameters of the model are constrained for $m_H=275$ GeV and $m_{\ddot{I}}‡=60$ GeV. A comparative study has been performed for the production of the Higgs boson in association with a single top and top-pairs in the Standard Model with respect to the processes where $h$ is replaced with the heavy scalar $H$, which further decays via $H\to h\ddot{I}‡\ddot{I}‡$. The analysis has been performed at two stages where the top quarks are studied through a single-lepton channel firstly, and then in the second case with same-sign leptons, electrons or muons in di-lepton events. Different observables, like $b$ and $c$-tagged jet multiplicities, total missing energy, and total scalar sum of transverse momenta of all jets and leptons, has been studied.

6 pages, 3 figures, 4 tables, HEPP2017 conference proceedings, iThembaLAB, Wits, Johannesburg