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Exotic sterile neutrinos and pseudo-Goldstone phenomenology
Journal of High Energy Physics, 2019 We study the phenomenology of a light (GeV scale) sterile neutrino sector and the pseudo-Goldstone boson (not the majoron) associated with a global symmetry in this sector that is broken at a high scale.
Bibhushan Shakya, James D. Wells
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Probing dark matter freeze-in with long-lived particle signatures: MATHUSLA, HL-LHC and FCC-hh
Journal of High Energy Physics, 2020 Collider searches for long-lived particles yield a promising avenue to probe the freeze-in production of Dark Matter via the decay of a parent particle.
J.M. No, P. Tunney, B. Zaldivar
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Cosmology with a very light L μ − L τ gauge boson
Journal of High Energy Physics, 2019 In this paper, we explore in detail the cosmological implications of an abelian L μ − L τ gauge extension of the Standard Model featuring a light and weakly coupled Z′.
Miguel Escudero +3 more
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Unstable cosmic neutrino capture
Journal of High Energy Physics, 2022 Future direct observations of the Cosmic Neutrino Background (CνB) have the potential to explore a neutrino lifetime, especially in the region of the age of the universe, t 0 = 4.35 × 1017 s.
Kensuke Akita +2 more
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Assessing perturbativity and vacuum stability in high-scale leptogenesis
Journal of High Energy Physics, 2018 We consider the requirements that all coupling constants remain perturbative and the electroweak vacuum metastable up to the Planck scale in high-scale thermal leptogenesis, in the context of a type-I seesaw mechanism. We find a large region of the model
Seyda Ipek +2 more
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Sterile neutrino dark matter in left-right theories
Journal of High Energy Physics, 2020 SU(2) L × SU(2) R gauge symmetry requires three right-handed neutrinos (N i ), one of which, N 1, can be sufficiently stable to be dark matter. In the early universe, W R exchange with the Standard Model thermal bath keeps the right-handed neutrinos in ...
Jeff A. Dror +3 more
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HERA Physics Beyond the Standard Model [PDF]
, 1999 The prospects of physics beyond the standard model in deep inelastic scattering are reviewed, emphasizing some scenarios which attained attention after the observation of an excess of events with large momentum transfer at HERA.Comment: 8 pages, LaTeX ...
+32 more
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Mass hierarchy and physics beyond the Standard Model
EPJ Web of Conferences, 2014 I discuss the status of the mass hierarchy problem and prospects for beyond the Standard Model physics in the light of the Higgs scalar discovery at the LHC and the experimental searches for new physics.
Antoniadis Ignatios
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Dark matter, dark radiation and gravitational waves from mirror Higgs parity
Journal of High Energy Physics, 2020 An exact parity replicates the Standard Model giving a Mirror Standard Model, SM ↔ SM ′ . This “Higgs Parity” and the mirror electroweak symmetry are spontaneously broken by the mirror Higgs, 〈H ′〉 = v ′ ≫ 〈H〉, yielding the Standard Model Higgs as a ...
David Dunsky +2 more
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An allowed window for heavy neutral leptons below the kaon mass
Journal of High Energy Physics, 2021 The extension of the Standard Model with two gauge-singlet Majorana fermions can simultaneously explain two beyond-the-Standard-model phenomena: neutrino masses and oscillations, as well as the origin of the matter-antimatter asymmetry in the Universe ...
Kyrylo Bondarenko +6 more
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