CMS-PAS-FTR-21-003

CMS-PAS-FTR-21-003
Prospects for HH measurements in the WW$\gamma\gamma$ and $\tau\tau\gamma\gamma$ final states in proton-proton collisions at $\sqrt{s}=$ 14 TeV at the High Luminosity-LHC
CMS Collaboration
March 2022

Abstract: Prospects for nonresonant Higgs boson pair production measurements in the WW$\gamma\gamma$ and $\tau\tau\gamma\gamma$ final states in proton-proton collisions at a centre-of-mass energy of 14 TeV with the upgraded Phase-2 CMS detector at the High-Luminosity LHC (HL-LHC) are presented. The study is performed using generated events that passed DELPHES fast simulation of the CMS detector with an average of 200 proton-proton interactions per bunch crossing and an integrated luminosity of 3000 fb$^{-1}$.
Links: CDS record (PDF) ; CADI line (restricted) ;

Figures & Tables	Summary	References	CMS Publications

Figures
png pdf	Figure 1: Feynman diagrams for leading order Higgs boson pair production via gluon fusion.
png pdf	Figure 1-a: Feynman diagrams for leading order Higgs boson pair production via gluon fusion.
png pdf	Figure 1-b: Feynman diagrams for leading order Higgs boson pair production via gluon fusion.
png pdf	Figure 2: DNN output scores in the one lepton (left) and one tau (right) final states.
png pdf	Figure 2-a: DNN output scores in the one lepton (left) and one tau (right) final states.
png pdf	Figure 2-b: DNN output scores in the one lepton (left) and one tau (right) final states.
png pdf	Figure 3: $m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (left) and ${\tau \tau \gamma \gamma}$, 1$\tau $ (right) final states.
png pdf	Figure 3-a: $m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (left) and ${\tau \tau \gamma \gamma}$, 1$\tau $ (right) final states.
png pdf	Figure 3-b: $m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (left) and ${\tau \tau \gamma \gamma}$, 1$\tau $ (right) final states.
png pdf	Figure 4: $m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (top left), 2L (top right) and {\tau \tau \gamma \gamma}, 2$\tau $s (bottom) final states.
png pdf	Figure 4-a: $m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (top left), 2L (top right) and {\tau \tau \gamma \gamma}, 2$\tau $s (bottom) final states.
png pdf	Figure 4-b: $m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (top left), 2L (top right) and {\tau \tau \gamma \gamma}, 2$\tau $s (bottom) final states.
png pdf	Figure 4-c: $m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (top left), 2L (top right) and {\tau \tau \gamma \gamma}, 2$\tau $s (bottom) final states.

Tables
png pdf	Table 1: One Lepton final state DNN score categories.
png pdf	Table 2: Selection criteria of the Two Lepton Channel.
png pdf	Table 3: Experimental uncertainties considered in this study.
png pdf	Table 4: Theoretical uncertainties considered on the ggHH signal and single Higgs processes.
png pdf	Table 5: Expected HL-LHC significances ($\sigma $) results of the WW$\gamma \gamma $ and ${\tau \tau \gamma \gamma}$ processes with their combination.

Summary

A measurement of non-resonant Higgs boson pair production in the WW$\gamma\gamma$ and ${\tau\tau\gamma\gamma}$ final states was performed in simulated proton-proton collision events at a centre-of-mass energy of 14 TeV and integrated luminosity of 3000 fb$^{-1}$ at the HL-LHC. Combining all final state categories and including systematic uncertainties, an expected significance 0.22$\sigma$ for signal is measured.

References
1	ATLAS Collaboration	Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC	PLB 716 (2012) 1	1207.7214
2	CMS Collaboration	Observation of a New Boson at a Mass of 125 GeV with the CMS Experiment at the LHC	PLB 716 (2012) 30	CMS-HIG-12-028 1207.7235
3	CMS Collaboration	Observation of a New Boson with Mass Near 125 GeV in $ pp $ Collisions at $ \sqrt{s} = $ 7 and 8 TeV	JHEP 06 (2013) 081	CMS-HIG-12-036 1303.4571
4	DELPHES 3 Collaboration	DELPHES 3, A modular framework for fast simulation of a generic collider experiment	JHEP 02 (2014) 057	1307.6346
5	CMS Collaboration	The CMS Experiment at the CERN LHC	JINST 3 (2008) S08004	CMS-00-001
6	CMS Collaboration	Technical Proposal for the Phase-II Upgrade of the CMS Detector	CMS-PAS-TDR-15-002	CMS-PAS-TDR-15-002
7	CMS Collaboration	The Phase-2 Upgrade of the CMS Tracker	CMS-PAS-TDR-17-001	CMS-PAS-TDR-17-001
8	CMS Collaboration	The Phase-2 Upgrade of the CMS Barrel Calorimeters Technical Design Report	CMS-PAS-TDR-17-002	CMS-PAS-TDR-17-002
9	CMS Collaboration	The Phase-2 Upgrade of the CMS Endcap Calorimeter	CMS-PAS-TDR-17-007	CMS-PAS-TDR-17-007
10	CMS Collaboration	The Phase-2 Upgrade of the CMS Muon Detectors	CMS-PAS-TDR-17-003	CMS-PAS-TDR-17-003
11	CMS Collaboration	A MIP Timing Detector for the CMS Phase-2 Upgrade	CMS-PAS-TDR-19-002	CMS-PAS-TDR-19-002
12	CMS Collaboration	The Phase-2 Upgrade of the CMS Level-1 Trigger	CMS-PAS-TDR-20-001	CMS-PAS-TDR-20-001
13	CMS Collaboration	The Phase-2 Upgrade of the CMS Data Acquisition and High Level Trigger	CDS
14	CMS Collaboration	Expected performance of the physics objects with the upgraded CMS detector at the HL-LHC	CDS
15	P. Nason	A New method for combining NLO QCD with shower Monte Carlo algorithms	JHEP 11 (2004) 040	hep-ph/0409146
16	S. Frixione, P. Nason, and C. Oleari	Matching NLO QCD computations with Parton Shower simulations: the POWHEG method	JHEP 11 (2007) 070	0709.2092
17	S. Alioli, P. Nason, C. Oleari, and E. Re	A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX	JHEP 06 (2010) 043	1002.2581
18	G. Heinrich et al.	Probing the trilinear Higgs boson coupling in di-Higgs production at NLO QCD including parton shower effects	JHEP 06 (2019) 066	1903.08137
19	T. Sjostrand et al.	An Introduction to PYTHIA 8.2	CPC 191 (2015) 159	1410.3012
20	J. Alwall et al.	The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations	JHEP 07 (2014) 079	1405.0301
21	P. Artoisenet, R. Frederix, O. Mattelaer, and R. Rietkerk	Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations	JHEP 03 (2013) 015	1212.3460
22	R. Frederix and S. Frixione	Merging meets matching in MC@NLO	JHEP 12 (2012) 061	1209.6215
23	Sherpa Collaboration	Event Generation with Sherpa 2.2	SciPost Phys. 7 (2019), no. 3, 034	1905.09127
24	CMS Collaboration	Performance of the DeepJet b tagging algorithm using 41.9/fb of data from proton-proton collisions at 13TeV with Phase 1 CMS detector	CDS
25	E. Bols et al.	Jet Flavour Classification Using DeepJet	JINST 15 (2020), no. 12, P12012	2008.10519
26	A. Dainese et al.	Report on the Physics at the HL-LHC, and Perspectives for the HE-LHC	technical report, Geneva, Switzerland
27	The ATLAS Collaboration, The CMS Collaboration, The LHC Higgs Combination Group Collaboration	Procedure for the LHC Higgs boson search combination in Summer 2011	technical report, CERN, Geneva, Aug