Results 31 to 40 of about 9,023 (214)
Relativistic and spectator effects in leptogenesis with heavy sterile neutrinos
, 2020 For leptogenesis with heavy sterile neutrinos above the electroweak scale, asymmetries produced at early times (in the relativistic regime) are relevant, if they are protected from washout.
Garbrecht, Björn +2 more
core +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
Dark matter sterile neutrinos in stellar collapse: alteration of energy/lepton number transport and a mechanism for supernova explosion enhancement [PDF]
, 2006 We investigate matter-enhanced Mikheyev-Smirnov-Wolfenstein (MSW) active-sterile neutrino conversion in the $\nu_e \rightleftharpoons \nu_s$ channel in the collapse of the iron core of a pre-supernova star.
A. Boyarsky +5 more
core +2 more sources
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
The Invisible Axion and Neutrino Masses
, 2006 We show that in any invisible axion model due to the effects of effective non-renormalizable interactions related to an energy scale near the Peccei-Quinn, grand unification or even the Planck scale, active neutrinos necessarily acquire masses in the sub-
Alex G. Dias +4 more
core +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