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

TL;DR

This study explores the potential to detect a heavy scalar particle at the future LHeC collider using fully hadronic decay channels, employing multiple reconstruction methods to address challenges posed by missing energy and forward jets.

Contribution

It introduces a detailed analysis of heavy scalar production via charged-current mode at the LHeC, comparing three reconstruction techniques for the fully hadronic final state.

Findings

Reconstruction methods improve mass determination accuracy.

Significance levels vary across different reconstruction approaches.

Feasibility demonstrated for a 270 GeV scalar at 1.3 TeV energy.

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$^{-1}$.