Prospects for HH measurements at the HL-LHC

CMS Physics Analysis Summaries
Report number	CMS-PAS-FTR-18-019
Title	Prospects for HH measurements at the HL-LHC
Corporate author(s)	CMS Collaboration
Collaboration	CMS Collaboration
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	The prospects for the study of Higgs boson pair production at the High-Luminosity LHC with the CMS detector are presented. Five decay channels, $\text{b}\text{b}\text{b}\text{b}$, $\text{b}\text{b}\text{W}\text{W}$, $\text{b}\text{b}\tau\tau$, $\text{b}\text{b}\gamma\gamma$, and $\text{b}\text{b}\text{Z}\text{Z}$, are studied. Analyses are developed using a parametric simulation of the upgraded detector response and optimised for a projected integrated luminosity of $3000\,\text{fb}^{-1}$. The statistical combination of the five decay channels results in an expected significance for the standard model $\text{HH}$ signal of $2.6\sigma$. Projections are also presented for the measurement of the Higgs boson self-coupling $\lambda_\text{HHH}$. The expected 68 and $95\%$ confidence level intervals for the coupling modifier $\kappa_\lambda = \lambda_\text{HHH} / \lambda_\text{HHH}^\text{SM}$ are $[0.35, 1.9]$ and $[-0.18, 3.6]$, respectively.
Other source	Inspire
Email contact: cms-phys-conveners-ftr@cern.ch Fulltext in PDF Figure_005-c Figure_005-b Figure_005-e Figure_010 Figure_005-d Figure_003-a Figure_003-b Figure_009 Figure_007-e Figure_007-d Figure_005-a Figure_007-f Figure_007-a Figure_005-f Figure_007-c Figure_007-b Figure_006-a Figure_006-b Figure_006-c Figure_002-a Figure_002-b Figure_008 Figure_004 Figure_001 Additional information for the analysis (restricted access)