Results 1 to 10 of about 42,326 (173)
Journal of High Energy Physics, 2022 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.
F. Delgado +4 more
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Constraints on NJL four-fermion effective interactions from neutrinoless double beta decay
Journal of High Energy Physics, 2023 We study the contribution of a heavy right-handed Majorana neutrino to neutrinoless double beta decay (0νββ) via four-fermion effective interactions of Nambu-Jona-Lasinio (NJL) type.
L. Pacioselli +3 more
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Journal of High Energy Physics, 2023 A muon collider could produce the heavier Standard Model particles with a boost, for example in resonant processes such as μ − μ + → h or μ − μ → Z. We propose machine configurations that produce the boost (asymmetric beam energies, tilted beams) and ...
Daniele Barducci, Alessandro Strumia
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Sensitivity of the FACET experiment to Heavy Neutral Leptons and Dark Scalars
Journal of High Energy Physics, 2023 We analyze the potential of the recently proposed experiment FACET (Forward-Aperture CMS ExTension) to search for new physics. As an example, we consider the models of Higgs-like scalars with cubic and quartic interactions and Heavy Neutral Leptons.
Maksym Ovchynnikov +2 more
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Long-lived heavy neutral leptons with a displaced shower signature at CMS
Journal of High Energy Physics, 2023 We study the LHC discovery potential in the search for heavy neutral leptons (HNL) with a new signature: a displaced shower in the CMS muon detector, giving rise to a large cluster of hits forming a displaced shower. A new Delphes module is used to model
Giovanna Cottin +5 more
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Improving heavy Dirac neutrino prospects at future hadron colliders using machine learning
Journal of High Energy Physics, 2022 In this work, by using the machine learning methods, we study the sensitivities of heavy pseudo-Dirac neutrino N in the inverse seesaw at the high-energy hadron colliders.
Jie Feng +6 more
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Probing right-handed neutrinos dipole operators
Journal of High Energy Physics, 2023 We consider the minimal see-saw extension of the Standard Model with two right-handed singlet fermions N 1,2 with mass at the GeV scale, augmented by an effective dipole operator between the sterile states.
Daniele Barducci +3 more
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Search for the dipole portal of heavy neutral leptons at future colliders
Journal of High Energy Physics, 2023 In this paper, we study the potential of future colliders to explore the parameter space of heavy neutral leptons (HNLs) through the dipole portal. We consider hadron colliders such as the LHC in the high luminosity phase and FCC-hh, and lepton colliders,
Maksym Ovchynnikov, Jing-Yu Zhu
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Neutrino seesaw models at one-loop matching: discrimination by effective operators
Journal of High Energy Physics, 2022 Using the functional method, one-loop matching of the type-I, -II and -III see-saw models are investigated and the results are presented in both the Green’s and the Warsaw bases. Although these models generate the same dimension-5 Weinberg operator, they
Yong Du, Xu-Xiang Li, Jiang-Hao Yu
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HNL mass degeneracy: implications for low-scale seesaws, LNV at colliders and leptogenesis
Journal of High Energy Physics, 2023 Low-scale seesaw variants protected by lepton number symmetry provide a natural explanation of the smallness of neutrino masses but, unlike their higher-scale counterparts, with potentially testable phenomenology.
Enrique Fernández-Martínez +2 more
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