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Title: Almost inert Higgs bosons at the LHC

Abstract

Non-minimal Higgs sectors are strongly constrained by the agreement of the measured couplings of the 125 GeV Higgs with Standard Model predictions. This agreement can be explained by an approximate $$\mathbb{Z}_{2}$$ symmetry under which the additional Higgs bosons are odd. This allows the additional Higgs bosons to be approximately inert, meaning that they have suppressed VEVs and suppressed mixing with the Standard Model Higgs. In this case, single production of the new Higgs bosons is suppressed, but electroweak pair production is unsuppressed. We study the phenomenology of a minimal 2 Higgs doublet model that realizes this scenario. In a wide range of parameters, the phenomenology of the model is essentially fixed by the masses of the exotic Higgs bosons, and can therefore be explored systematically. We study a number of different plausible signals in this model, and show that several LHC searches can constrain or discover additional Higgs bosons in this parameter space. We find that the reach is significantly extended at the high luminosity LHC.

Authors:
ORCiD logo [1];  [2];  [3]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Theoretical Physics Dept.
  2. Univ. of California, Davis, CA (United States). Center for Quantum Mathematics and Physics (QMAP)
  3. Univ. Técnica Federico Santa Marıa, Valparaíso (Chile). Dept. of Physics and CCTVal
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1569243
Report Number(s):
arXiv:1812.08179; FERMILAB-PUB-19-514-T
Journal ID: ISSN 1029-8479; oai:inspirehep.net:1710376
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2019; Journal Issue: 9; 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, Luty, Markus A., and Neill, Nicolás A. Almost inert Higgs bosons at the LHC. United States: N. p., 2019. Web. doi:10.1007/JHEP09(2019)043.
Gao, Christina, Luty, Markus A., & Neill, Nicolás A. Almost inert Higgs bosons at the LHC. United States. doi:10.1007/JHEP09(2019)043.
Gao, Christina, Luty, Markus A., and Neill, Nicolás A. Fri . "Almost inert Higgs bosons at the LHC". United States. doi:10.1007/JHEP09(2019)043. https://www.osti.gov/servlets/purl/1569243.
@article{osti_1569243,
title = {Almost inert Higgs bosons at the LHC},
author = {Gao, Christina and Luty, Markus A. and Neill, Nicolás A.},
abstractNote = {Non-minimal Higgs sectors are strongly constrained by the agreement of the measured couplings of the 125 GeV Higgs with Standard Model predictions. This agreement can be explained by an approximate $\mathbb{Z}_{2}$ symmetry under which the additional Higgs bosons are odd. This allows the additional Higgs bosons to be approximately inert, meaning that they have suppressed VEVs and suppressed mixing with the Standard Model Higgs. In this case, single production of the new Higgs bosons is suppressed, but electroweak pair production is unsuppressed. We study the phenomenology of a minimal 2 Higgs doublet model that realizes this scenario. In a wide range of parameters, the phenomenology of the model is essentially fixed by the masses of the exotic Higgs bosons, and can therefore be explored systematically. We study a number of different plausible signals in this model, and show that several LHC searches can constrain or discover additional Higgs bosons in this parameter space. We find that the reach is significantly extended at the high luminosity LHC.},
doi = {10.1007/JHEP09(2019)043},
journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 9,
volume = 2019,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Production cross section for pairs of exotic Higgs bosons as a function of the total mass of the nal state at LHC 13TeV. Each curve corresponds tomore » $σ$ $^{LO}_{pp→V→ H_1H_2}$ , where $V$ = $W$± , $Z$ as appropriate. For $H$±$A$ we consider $m$$H$± = $m$$A$. For $H$±$\phi$ 0 and $A$$\phi$ 0 the cross section depends on two independent masses; we choose $m$$H$± = $m$$A$ = 110 GeV and vary $m$$\phi$ 0 . The cross sections were obtained with MadGraph.« less

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