Studies on the $H\rightarrow bb$ cross section measurement at the LHeC with a full detector simulation

TL;DR

This study compares fast simulation results with full detector simulation for measuring the Higgs to bb decay at the LHeC, demonstrating high-precision analysis capabilities using advanced reconstruction algorithms.

Contribution

It provides a detailed comparison between fast and full detector simulations for Higgs to bb measurements at the LHeC, validating the precision of the analysis.

Findings

Full simulation confirms fast simulation results within uncertainties.

High-precision Higgs to bb coupling measurement is feasible.

Advanced algorithms enable independent verification of previous results.

Abstract

The future Large Hadron electron Collider (LHeC) would allow collisions of an intense electron beam with protons or heavy ions at the High Luminosity-Large Hadron Collider (HL-LHC). Owing to a center of mass energy greater than a TeV and very high luminosity (~1 ab{-1}), the LHeC would not only be a new generation collider for deep-inelastic scattering (DIS) but also an important facility for precision Higgs physics, complementary to pp and e+ e- colliders. Previously, it has been found that uncertainties of 0.8% and 7.4% can be achieved on the Higgs boson coupling strength to b- and c-quarks respectively. These results were obtained in the fast simulation frameworks for the LHeC detector. Focusing on the dominant Higgs boson decay channel, H to bb, the present work aims to give a comparison of these results with a fully simulated detector. We present our results in this study using the publicly available ATLAS software infrastructure. Based on state-of-the art reconstruction algorithms, a novel analysis of the bb decay could be performed leading to an independent verification of the existing results to an exceptionally high precision.