Combined analysis of jet substructure for Higgs decay to $b\bar{b}$ in vector boson associated production at the 13 TeV LHC

TL;DR

This paper analyzes jet substructure techniques to improve the detection of Higgs boson decays to bottom quarks in vector boson associated production at 13 TeV LHC, achieving significant signal enhancement.

Contribution

It combines mass-drop tagging, filtering, and N-subjettiness analysis to improve Higgs to b b̄ signal significance in a challenging background environment.

Findings

Significance increased to 3.52σ with 13.2 fb⁻¹

Expected 5σ discovery with 27 fb⁻¹

Effective background suppression techniques demonstrated

Abstract

We study the Standard Model Higgs and vector boson associated production with large transvese momentum at the 13 TeV LHC, followed by Higgs decay to bottom quark pair. Using mass-drop tagging and filtering techiques, we obtained the cross section of signal and background. The background mainly come from $Vb\bar{b}$, $t\bar{t}$ and single top production. In order to suppress them further, we combined the mass-drop tagging and filtering analysis with $N$-subjettiness jet shape. After performing $N$-subjettiness identification, the significance can be enhanced to 3.52$\sigma$ with current integrated luminosity of $13.2 {\rm fb}^{-1}$. $H\to b\bar{b}$ decay channel is expected to reach 5$\sigma$ with $27\,{\rm fb}^{-1}$ at the 13 TeV LHC.