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 $CP$ even scalar $H$ of mass $2m_h<m_H<2m_t$ 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${}^{-1}$.

accepted for publication in EPJC