Prospects of non-resonant Higgs pair production at the HL-LHC and HE-LHC

Amit Adhikary,Rahool Kumar Barman,Saurabh Niyogi,Biplob Bhattacherjee,Shankha Banerjee

doi:10.1088/1742-6596/1690/1/012149

Abstract

The prospects of observing the di-Higgs production in the Standard Model (SM) is explored. We choose final states based on considerable production rate and cleanliness. Standard cut-based and multivariate analyses using the Boosted Decision Tree (BDT) algorithm is performed at the high luminosity run of the 14 TeV LHC (HL-LHC) and we got a combined signal significance of ∼ 2.1. For the proposed high energy upgrade of the LHC (HE-LHC) at , we do multivariate analyses using BDT algorithm, the XGBoost toolkit and Deep Neural Network (DNN), and we observe a discovery prospect with > 5σ significance for the Higgs pair production.

Highlights

The Higgs boson which constitutes the scalar sector in the Standard Model (SM) has been observed at the Large Hadron Collider (LHC) by ATLAS [1] and CMS [2] collaboration in2012
In this work, we study the prospect of observing Higgs pair production through various final states
The bbγγ channel is the most promising search channel to look for di-Higgs production which gives rise to signal significance of 1.76 from Boosted Decision Tree (BDT) analysis

Summary

Introduction

The Higgs boson which constitutes the scalar sector in the Standard Model (SM) has been observed at the Large Hadron Collider (LHC) by ATLAS [1] and CMS [2] collaboration in. Properties of the Higgs boson are being measured with precision by collecting more data over the years, namely, its coupling to the various SM particles, its width, spin and CP properties. Another important property related to Higgs physics is its self-coupling (λhhh) which determines the nature of the Higgs potential. To observe Higgs pair production at the experiment, we have to look for possible final states arising from decay of the two Higgs bosons. We analyse ab−1 of integrated the prospect of di-Higgs production luminosity) in the bbγγ, bbτ τ , bbW W at the ∗, W W. Neural Network (DNN) [8,9,10]

Higgs pair production at the HL-LHC

Higgs pair production at the HE-LHC

Findings

Conclusion