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

Elias Malwa; Mukesh Kumar; Bruce Mellado; Xifeng Ruan

doi:10.1140/epjc/s10052-023-11303-6

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2023) 83: 148
https://doi.org/10.1140/epjc/s10052-023-11303-6

Regular Article - Theoretical Physics

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

Elias Malwa¹, Mukesh Kumar¹^b, Bruce Mellado¹^,2 and Xifeng Ruan¹

¹ School of Physics and Institute for Collider Particle Physics, University of the Witwatersrand (Wits), 2050, Johannesburg, South Africa
² iThemba LABS, National Research Foundation, PO Box 722, 7129, Somerset West, South Africa

^b mukesh.kumar@cern.ch

Received: 3 September 2022
Accepted: 3 February 2023
Published online: 15 February 2023

Abstract

The proposed future Large Hadron electron collider provides sufficient center of mass energies, $\sqrt{s}$ $\sqrt{s}$ , to probe heavy particles decaying into $W^{\pm} (Z) -$ $W^\pm (Z)-$ boson of mass $> 2 m_{W}$ $$>2m_W$$ $(2 m_{Z})$ $$(2m_Z)$$ . In this work we present a study to produce one such heavy CP even scalar H of mass $2 m_{h} < m_{H} < 2 m_{t}$ $$2m_h< m_H < 2 m_t$$ through charged-current production mode where $H \to W^{+} W^{-}$ $H \rightarrow W^+W^-$ , where hadronic decay of $W^{\pm} -$ $W^\pm -$ boson is considered to reconstruct $m_{H}$ $$m_H$$ . Due to the presence of missing energy and forward jet in this channel, it is challenging to reconstruct $m_{H}$ $$m_H$$ 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 $m_{H} = 270$ $$m_H = 270$$ GeV and $\sqrt{s} \approx 1.3$ $\sqrt{s} \approx 1.3$ TeV with an assumed luminosity of 1 ab $^{- 1}$ $^{-1}$ .

© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.