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Title: Displaced vertex signatures of doubly charged scalars in the type-II seesaw and its left-right extensions

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [1]
  1. Washington Univ., St. Louis, MO (United States)

The type-II seesaw mechanism with an isospin-triplet scalar ΔL provides one of the most compelling explanations for the observed smallness of neutrino masses. The triplet contains a doubly-charged component $$H^{±±}_{L}$$, which dominantly decays to either same-sign dileptons or to a pair of W bosons, depending on the size of the triplet vacuum expectation value. However, there exists a range of Yukawa couplings ƒL of the triplet to the charged leptons, wherein a relatively light $$H^{±±}_{L}$$ tends to be long-lived, giving rise to distinct displaced-vertex signatures at the high-energy colliders. We find that the displaced vertex signals from the leptonic decays $$H^{±±}_{L} → ℓ^±_αℓ^±_β$$ could probe a broad parameter space with 10-10 ≲ |ƒL| ≲ 10-6 and 45.6 GeV<$$M_{H^{±±}_{L}}$$≲200 GeV at the high-luminosity LHC. Similar sensitivity can also be achieved at a future 1 TeV e+e- collider. The mass reach can be extended to about 500GeV at a future 100TeV proton-proton collider. Similar conclusions apply for the right-handed triplet $$H^{±±}_{R}$$ in the TeV-scale left-right symmetric models, which provide a natural embedding of the type-II seesaw. We show that the displaced vertex signals are largely complementary to the prompt same-sign dilepton pair searches at the LHC and the low-energy, high-intensity/precision measurements, such as neutrinoless double beta decay, charged lepton flavor violation, electron and muon anomalous magnetic moments, muonium-antimuonium oscillation and Møller scattering.

Research Organization:
Washington Univ., St. Louis, MO (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0017987
OSTI ID:
1612803
Journal Information:
Journal of High Energy Physics (Online), Vol. 2018, Issue 10; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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  • Mohapatra, Rabindra; Dev, P. S. Bhupal; Zhang, Yongchao
  • Proceedings of The 39th International Conference on High Energy Physics — PoS(ICHEP2018) https://doi.org/10.22323/1.340.0645
conference August 2019
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Cited By (14)

Fermion dark matter with scalar triplet at direct and collider searches journal July 2019
Radiatively scotogenic type-II seesaw and a relevant phenomenological analysis journal October 2019
Doubly Charged Higgs Bosons and Spontaneous Symmetry Breaking at eV and TeV Scales journal January 2020
Study of energy deposition patterns in hadron calorimeter for prompt and displaced jets using convolutional neural network text January 2019
Low scale type II seesaw: present constraints and prospects for displaced vertex searches text January 2019
Perturbativity constraints on $U(1)_{B-L}$ and left-right models and implications for heavy gauge boson searches text January 2018
Fermion Dark Matter with Scalar Triplet at Direct and Collider Searches text January 2019
Scalar phenomenology in type-II seesaw model text January 2019
Study of energy deposition patterns in hadron calorimeter for prompt and displaced jets using convolutional neural network text January 2019
Radiatively scotogenic type-II seesaw and a relevant phenomenological analysis text January 2019
ν electroweak baryogenesis journal October 2020
Prospects of searches for long-lived charged particles with MoEDAL journal June 2020
Neutrino Masses and Hubble Tension via a Majoron in MFV preprint January 2021
Search for physics beyond the standard model at particle colliders using machine learning techniques text January 2021

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