Feasibility of the observation of a heavy scalar through the fully hadronic final state at the LHeC

Abstract

The proposed future Large Hadron Electron Collider provides sufficient center of mass energies, $\sqrt{s}$, to probe heavy particles decaying into $W^\pm(Z)-$boson of mass $>2m_W$ $(2m_Z)$. In this work we present a study to produce one such heavy $C P$ even scalar $H$ of mass $2m_h < m_H < 2 m_t$ through charged-current production mode where $H \to W^+W^-$, where hadronic decay of $W^\pm-$boson is considered to reconstruct $m_H$. Due to the presence of missing energy and forward jet in this channel, it is challenging to reconstruct $m_H$ with above final state and thus we employed three different reconstruction methods and discuss the significance of each one. For this analysis we consider a benchmark value of $m_H = 270$\,GeV and $\sqrt{s} \approx 1.3$\,TeV with an assumed luminosity of 1\,ab$^{-1}$.