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

Understand

Following arXiv:1506.00612, an effective field theory approach has been introduced for two additional real scalars, $H$ and $\chi$, 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 $m_\chi = 60$ 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 $H \to h \chi\chi$.
• 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.