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Title: Probing exotic triple Higgs couplings at the LHC

Abstract

In extended Higgs sectors that exhibit alignment without decoupling, the additional scalars are allowed to have large couplings to the Standard Model Higgs. We show that current nonresonant di-Higgs searches can be straightforwardly adapted to look for additional Higgses in these scenarios, where pair production of non-SM Higgses can be enhanced. For concreteness, we study pair production of exotic Higgses in the context of an almost inert two Higgs doublet model, where alignment is explained through an approximate $$\mathbb{Z}_2$$ symmetry under which the additional scalars are odd. In this context, the smallness of the $$\mathbb Z_2$$ violating parameter suppresses single production of exotic Higgses, but it does not prevent a sizeable trilinear coupling $hHH$ between the SM Higgs ($h$) and the additional states ($H$). We study the process $$pp\rightarrow h^* \rightarrow HH$$ in the final states of $$b\bar b b \bar b$$, $$b\bar b\gamma\gamma$$, and multi-leptons. We find that at the HL-LHC these modes could be sensitive to masses of the additional neutral scalars in the range $$130\mbox{ GeV} \lesssim m_H \lesssim 290\mbox{ GeV}$$.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Univ. de Tarapaca, Arica (Chile)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1592138
Report Number(s):
arXiv:2001.00069; FERMILAB-PUB-19-640-T
Journal ID: ISSN 1029-8479; oai:inspirehep.net:1773882; TRN: US2101844
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2020; Journal Issue: 5; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; beyond standard model; Higgs physics

Citation Formats

Gao, Christina, and Neill, Nicolás A. Probing exotic triple Higgs couplings at the LHC. United States: N. p., 2020. Web. doi:10.1007/JHEP05(2020)087.
Gao, Christina, & Neill, Nicolás A. Probing exotic triple Higgs couplings at the LHC. United States. doi:https://doi.org/10.1007/JHEP05(2020)087
Gao, Christina, and Neill, Nicolás A. Tue . "Probing exotic triple Higgs couplings at the LHC". United States. doi:https://doi.org/10.1007/JHEP05(2020)087. https://www.osti.gov/servlets/purl/1592138.
@article{osti_1592138,
title = {Probing exotic triple Higgs couplings at the LHC},
author = {Gao, Christina and Neill, Nicolás A.},
abstractNote = {In extended Higgs sectors that exhibit alignment without decoupling, the additional scalars are allowed to have large couplings to the Standard Model Higgs. We show that current nonresonant di-Higgs searches can be straightforwardly adapted to look for additional Higgses in these scenarios, where pair production of non-SM Higgses can be enhanced. For concreteness, we study pair production of exotic Higgses in the context of an almost inert two Higgs doublet model, where alignment is explained through an approximate $\mathbb{Z}_2$ symmetry under which the additional scalars are odd. In this context, the smallness of the $\mathbb Z_2$ violating parameter suppresses single production of exotic Higgses, but it does not prevent a sizeable trilinear coupling $hHH$ between the SM Higgs ($h$) and the additional states ($H$). We study the process $pp\rightarrow h^* \rightarrow HH$ in the final states of $b\bar b b \bar b$, $b\bar b\gamma\gamma$, and multi-leptons. We find that at the HL-LHC these modes could be sensitive to masses of the additional neutral scalars in the range $130\mbox{ GeV} \lesssim m_H \lesssim 290\mbox{ GeV}$.},
doi = {10.1007/JHEP05(2020)087},
journal = {Journal of High Energy Physics (Online)},
number = 5,
volume = 2020,
place = {United States},
year = {2020},
month = {5}
}

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Works referenced in this record:

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