CMS-PAS-FTR-22-006

CMS-PAS-FTR-22-006
Prospects for a Search for Doubly Charged Higgs Bosons at the HL-LHC
CMS Collaboration
May 2022

Abstract: A variety of new physics theories, including left-right symmetric and type-II seesaw models, predict a massive, TeV-scale, doubly charged Higgs-like particle. These can be pair-produced in hadronic interactions via a Drell-Yan-like mechanism and decay to a pair of like-sign muons or electrons. We present an analysis based on simulated DELPHES events with the Phase-2 CMS detector at the High-Luminosity LHC. This analysis estimates a lower expected exclusion mass limit of 1400 GeV at 95% CL for a doubly charged Higgs boson decaying into a pair of electrons or muons.
Links: CDS record (PDF) ; CADI line (restricted) ;

Figures & Tables	Summary	References	CMS Publications

Figures
png pdf	Figure 1: The Feynman diagram for $H^{\pm \pm}$ production and subsequent decay.
png pdf	Figure 2: Two-dimensional plots of SSDL masses of positively charged leptons on the horizontal axis and negatively charged leptons on the vertical axis. The top plot is for $H^{\pm \pm}$ events with $m=700$ GeV and the bottom plot is for QCD events with a scalar sum of $p_{\mathrm{T}}$ greater than 2000 GeV, which is one prominent background process.
png	Figure 2-a: Two-dimensional plots of SSDL masses of positively charged leptons on the horizontal axis and negatively charged leptons on the vertical axis. The top plot is for $H^{\pm \pm}$ events with $m=700$ GeV and the bottom plot is for QCD events with a scalar sum of $p_{\mathrm{T}}$ greater than 2000 GeV, which is one prominent background process.
png	Figure 2-b: Two-dimensional plots of SSDL masses of positively charged leptons on the horizontal axis and negatively charged leptons on the vertical axis. The top plot is for $H^{\pm \pm}$ events with $m=700$ GeV and the bottom plot is for QCD events with a scalar sum of $p_{\mathrm{T}}$ greater than 2000 GeV, which is one prominent background process.
png pdf	Figure 3: Limits, at 95% CL, of the product of the cross section times branching fraction as a function of the Higgs mass when the $H^{\pm \pm}$ decays only to electrons (top) or muons (bottom).
png pdf	Figure 3-a: Limits, at 95% CL, of the product of the cross section times branching fraction as a function of the Higgs mass when the $H^{\pm \pm}$ decays only to electrons (top) or muons (bottom).
png pdf	Figure 3-b: Limits, at 95% CL, of the product of the cross section times branching fraction as a function of the Higgs mass when the $H^{\pm \pm}$ decays only to electrons (top) or muons (bottom).

Tables
png pdf	Table 1: Expected event yield for 3000 fb$^{-1}$, assuming 100% branching ratio to electrons.

Summary

The obtained limits compare favorably to the latest Run II ATLAS results [5] when scaled to the same luminosity. This proves the robustness of the present analysis and shows that this search will benefit greatly from the HL-LHC.

References
1	G. Senjanovic and R. N. Mohapatra	Exact left-right symmetry and spontaneous violation of parity	PRD 12 (Sep, 1975) 1502
2	G. G. Boyarkina and O. M. Boyarkin	(g-2)$ \mu $ anomaly, higgs bosons, and heavy neutrinos	Physical Review D 67 (Apr, 2003)
3	S. Ashanujjaman and K. Ghosh	Revisiting type-ii see-saw: Present limits and future prospects at lhc	2021
4	CMS Collaboration	A search for a doubly-charged higgs boson in pp collisions at $ \sqrt{s} = $ 7 TeV	The European Physical Journal C 72 (Nov, 2012)
5	M. Aaboud et al.	Search for doubly charged higgs boson production in multi-lepton final states with the atlas detector using proton-proton collisions at $ \sqrt{s}=$ 13 TeV	The European Physical Journal C 78 (Mar, 2018)
6	CMS Collaboration	The CMS Experiment at the CERN LHC	JINST 3 (2008) S08004	CMS-00-001
7	CMS Collaboration	Technical Proposal for the Phase-II Upgrade of the CMS Detector	CMS-PAS-TDR-15-002	CMS-PAS-TDR-15-002
8	CMS Collaboration	The Phase-2 Upgrade of the CMS Tracker	CMS-PAS-TDR-17-001	CMS-PAS-TDR-17-001
9	CMS Collaboration	The Phase-2 Upgrade of the CMS Barrel Calorimeters Technical Design Report	CMS-PAS-TDR-17-002	CMS-PAS-TDR-17-002
10	CMS Collaboration	The Phase-2 Upgrade of the CMS Endcap Calorimeter	CMS-PAS-TDR-17-007	CMS-PAS-TDR-17-007
11	CMS Collaboration	The Phase-2 Upgrade of the CMS Muon Detectors	CMS-PAS-TDR-17-003	CMS-PAS-TDR-17-003
12	CMS Collaboration	A MIP Timing Detector for the CMS Phase-2 Upgrade	CDS
13	CMS Collaboration	The Phase-2 Upgrade of the CMS Level-1 Trigger	CDS
14	CMS Collaboration	The Phase-2 Upgrade of the CMS Data Acquisition and High Level Trigger	CDS
15	CMS Collaboration	Expected performance of the physics objects with the upgraded CMS detector at the HL-LHC	CDS
16	T. Sjostrand et al.	An introduction to PYTHIA 8.2	CPC 191 (2015) 159	1410.3012
17	K. Huitu, J. Maalampi, A. Pietila, and M. Raidal	Doubly charged higgs at lhc	Nuclear Physics B 487 (Mar, 1997) 27
18	B. Dutta et al.	Exploring the doubly charged Higgs boson of the left-right symmetric model using vector boson fusionlike events at the LHC	PRD 90 (2014) 055015	1404.0685
19	M. Muhlleitner and M. Spira	Note on doubly charged higgs boson pair production at hadron colliders	Physical Review D 68 (Dec, 2003)
20	R. D. Ball et al.	Parton distributions from high-precision collider data	The European Physical Journal C 77 (Oct, 2017)
21	G. Barenboim, K. Huitu, J. Maalampi, and M. Raidal	Constraints on doubly charged Higgs interactions at linear collider	PLB 394 (1997) 132	hep-ph/9611362
22	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	Journal of High Energy Physics 2014 (Jul, 2014)
23	J. de Favereau et al.	Delphes 3: a modular framework for fast simulation of a generic collider experiment	Journal of High Energy Physics 2014 (Feb, 2014)
24	G. Cowan,	Statistics, Ch. 39 in the Review of particle physics of the PDG	CPC 40 (2016) 100001