Results 21 to 30 of about 1,008 (140)
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Investigating Sterile Neutrino Flux in the Solar Neutrino Data
Advances in High Energy Physics, Volume 2019, Issue 1, 2019., 2019 There are compelling evidences for the existence of a fourth degree of freedom of neutrinos, i.e., sterile neutrino. In the recent studies the role of sterile component of neutrinos has been found to be crucial, not only in particle physics, but also in astrophysics and cosmology.
Ankush +4 more
wiley +1 more source
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
doaj +1 more source
Advances in High Energy Physics, Volume 2019, Issue 1, 2019., 2019 Very recently novel implementation of type‐II seesaw mechanism for neutrino mass has been proposed in SU(5) grand unified theory with a number of desirable new physical phenomena beyond the standard model. Introducing heavy right‐handed neutrinos and extra fermion singlets, in this work we show how the type‐I seesaw cancellation mechanism works in this
M. K. Parida +2 more
wiley +1 more source
Heavy neutral leptons at muon colliders
Journal of High Energy Physics, 2023 The future high-energy muon colliders, featuring both high energy and low background, could play a critical role in our searches for new physics. The smallness of neutrino mass is a puzzle of particle physics.
Peiran Li, Zhen Liu, Kun-Feng Lyu
doaj +1 more source