Abstract
One of the cleanest signatures of a heavy Higgs boson in models with vectorlike leptons is \( H\to {e}_{{}^4}^{\pm }{\ell}^{\mp}\to h{\ell}^{+}{\ell}^{-} \) which, in two Higgs doublet model type-II, can even be the dominant decay mode of heavy Higgses. Among the decay modes of the standard model like Higgs boson, h, we consider \( b\overline{b} \) and γγ as representative channels with sizable and negligible background, respectively. We obtained new model independent limits on production cross section for this process from recasting existing experimental searches and interpret them within the two Higgs doublet model. In addition, we show that these limits can be improved by about two orders of magnitude with appropriate selection cuts immediately with existing data sets. We also discuss expected sensitivities with integrated luminosity up to 3 ab−1 and present a brief overview of other channels.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
R. Dermisek, E. Lunghi and S. Shin, New decay modes of heavy Higgs bosons in a two Higgs doublet model with vectorlike leptons, JHEP 05 (2016) 148 [arXiv:1512.07837] [INSPIRE].
R. Dermisek, E. Lunghi and S. Shin, Two Higgs doublet model with vectorlike leptons and contributions to pp → W W and H → W W , JHEP 02 (2016) 119 [arXiv:1509.04292] [INSPIRE].
R. Dermisek, J.P. Hall, E. Lunghi and S. Shin, Limits on vectorlike leptons from searches for anomalous production of multi-lepton events, JHEP 12 (2014) 013 [arXiv:1408.3123] [INSPIRE].
N. Kumar and S.P. Martin, Vectorlike leptons at the Large Hadron Collider, Phys. Rev. D 92 (2015) 115018 [arXiv:1510.03456] [INSPIRE].
A. Falkowski, D.M. Straub and A. Vicente, Vector-like leptons: Higgs decays and collider phenomenology, JHEP 05 (2014) 092 [arXiv:1312.5329] [INSPIRE].
S.A.R. Ellis, R.M. Godbole, S. Gopalakrishna and J.D. Wells, Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications, JHEP 09 (2014) 130 [arXiv:1404.4398] [INSPIRE].
R. Dermisek, A. Raval and S. Shin, Effects of vectorlike leptons on h → 4ℓ and the connection to the muon g − 2 anomaly, Phys. Rev. D 90 (2014) 034023 [arXiv:1406.7018] [INSPIRE].
R. Dermisek and A. Raval, Explanation of the muon g − 2 anomaly with vectorlike leptons and its implications for Higgs decays, Phys. Rev. D 88 (2013) 013017 [arXiv:1305.3522] [INSPIRE].
ATLAS collaboration, Search for a new resonance decaying to a W or Z boson and a Higgs boson in the \( \ell \ell /\ell \nu /\nu \nu +b\overline{b} \) final states with the ATLAS detector, Eur. Phys. J. C 75 (2015) 263 [arXiv:1503.08089] [INSPIRE].
CMS collaboration, Search for a pseudoscalar boson decaying into a Z boson and the 125 GeV Higgs boson in \( {\ell}^{+}{\ell}^{-}b\overline{b} \) final states, Phys. Lett. B 748 (2015) 221 [arXiv:1504.04710] [INSPIRE].
ATLAS collaboration, Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at \( \sqrt{s}=8 \) TeV with ATLAS, JHEP 09 (2014) 112 [arXiv:1407.4222] [INSPIRE].
ATLAS collaboration, Measurements of Zγ and Zγγ production in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Rev. D 93 (2016) 112002 [arXiv:1604.05232] [INSPIRE].
R. Dermisek, E. Lunghi and S. Shin, Contributions of flavor violating couplings of a Higgs boson to pp → W W , JHEP 08 (2015) 126 [arXiv:1503.08829] [INSPIRE].
C. Degrande, C. Duhr, B. Fuks, D. Grellscheid, O. Mattelaer and T. Reiter, UFO — The Universal FeynRules Output, Comput. Phys. Commun. 183 (2012) 1201 [arXiv:1108.2040] [INSPIRE].
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 [arXiv:1405.0301] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
DELPHES 3 collaboration, J. de Favereau et al., DELPHES 3, a modular framework for fast simulation of a generic collider experiment, JHEP 02 (2014) 057 [arXiv:1307.6346] [INSPIRE].
M. Cacciari and G.P. Salam, Dispelling the N 3 myth for the k t jet-finder, Phys. Lett. B 641 (2006) 57 [hep-ph/0512210] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, FastJet user manual, Eur. Phys. J. C 72 (2012) 1896 [arXiv:1111.6097] [INSPIRE].
A.L. Read, Modified frequentist analysis of search results (the CLs method), CERN Yellow report 2000-205 (2000).
ATLAS collaboration, Procedure for the LHC Higgs boson search combination in summer 2011, ATL-PHYS-PUB-2011-011 (2011) [ATL-COM-PHYS-2011-818] [CMS-NOTE-2011-005].
R. Dermisek, J.P. Hall, E. Lunghi and S. Shin, A new avenue to charged Higgs discovery in multi-Higgs models, JHEP 04 (2014) 140 [arXiv:1311.7208] [INSPIRE].
ATLAS collaboration, Search for new resonances decaying to a W or Z boson and a Higgs boson in the \( \ell \ell b\overline{b} \) , \( \ell \nu b\overline{b} \) and \( \nu \nu b\overline{b} \) channels in pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, ATLAS-CONF-2015-074 (2015).
LHC Higgs Cross Section Working Group collaboration, J.R. Andersen et al., Handbook of LHC Higgs Cross Sections: 3. Higgs Properties, arXiv:1307.1347 [INSPIRE].
Particle Data Group collaboration, K.A. Olive et al., Review of particle physics, Chin. Phys. C 38 (2014) 090001 [INSPIRE].
ATLAS collaboration, Search for a CP-odd Higgs boson decaying to Zh in pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector,ATLAS-CONF-2016-015 (2016).
ATLAS collaboration, Search for the bb decay of the standard model Higgs boson in associated (W/Z) H production with the ATLAS detector, JHEP 01 (2015) 069 [arXiv:1409.6212] [INSPIRE].
ATLAS collaboration, Search for a CP-odd Higgs boson decaying to Zh in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Lett. B 744 (2015) 163 [arXiv:1502.04478] [INSPIRE].
CMS collaboration, Searches for a heavy scalar boson H decaying to a pair of 125 GeV Higgs bosons hh or for a heavy pseudoscalar boson A decaying to Zh, in the final states with h→ττ, Phys. Lett. B 755 (2016) 217 [arXiv:1510.01181] [INSPIRE].
S. Jung, J. Song and Y.W. Yoon, Dip or nothingness of a Higgs resonance from the interference with a complex phase, Phys. Rev. D 92 (2015) 055009 [arXiv:1505.00291] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1608.00662
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Dermíšek, R., Lunghi, E. & Shin, S. New constraints and discovery potential for Higgs to Higgs cascade decays through vectorlike leptons. J. High Energ. Phys. 2016, 81 (2016). https://doi.org/10.1007/JHEP10(2016)081
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP10(2016)081