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Assessment of the dimension-5 seesaw portal and impact of exotic Higgs decays on non-pointing photon searches

  • Regular Article - Theoretical Physics
  • Open access
  • Published: 12 September 2022
  • volume 2022, Article number: 79 (2022)
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Assessment of the dimension-5 seesaw portal and impact of exotic Higgs decays on non-pointing photon searches
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  • F. Delgado1,
  • L. Duarte  ORCID: orcid.org/0000-0003-1445-61832,
  • J. Jones-Pérez  ORCID: orcid.org/0000-0002-2037-63691,
  • C. Manrique-Chavil1 &
  • …
  • S. Peña1 

  • 140 Accesses

  • 8 Citations

  • 4 Altmetric

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A preprint version of the article is available at arXiv.

Abstract

The Dimension-5 Seesaw Portal is a Type-I Seesaw model extended by d = 5 operators involving the sterile neutrino states, leading to new interactions between all neutrinos and the Standard Model neutral bosons. In this work we focus primarily on the implications of these new operators at the GeV-scale. In particular, we recalculate the heavy neutrino full decay width, up to three-body decays. We also review bounds on the dipole operator, and revisit LEP constraints on its coefficient. Finally, we turn to heavy neutrino pair production from Higgs decays, where the former are long-lived and disintegrate into a photon and a light neutrino. We probe this process by recasting two ATLAS searches for non-pointing photons, showing the expected event distribution in terms of arrival time tγ and pointing variable |∆zγ|.

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Authors and Affiliations

  1. Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, 1761, Apartado, Lima, Peru

    F. Delgado, J. Jones-Pérez, C. Manrique-Chavil & S. Peña

  2. Instituto de Física, Facultad de Ciencias, Universidad de la República, 4225, Iguá, Montevideo, Uruguay

    L. Duarte

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  1. F. Delgado
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  3. J. Jones-Pérez
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Delgado, F., Duarte, L., Jones-Pérez, J. et al. Assessment of the dimension-5 seesaw portal and impact of exotic Higgs decays on non-pointing photon searches. J. High Energ. Phys. 2022, 79 (2022). https://doi.org/10.1007/JHEP09(2022)079

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  • Received: 07 June 2022

  • Revised: 23 July 2022

  • Accepted: 13 August 2022

  • Published: 12 September 2022

  • DOI: https://doi.org/10.1007/JHEP09(2022)079

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Keywords

  • Sterile or Heavy Neutrinos
  • Specific BSM Phenomenology
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