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Probes of Heavy Sterile Neutrinos [PDF]
, 2022 We review probes of heavy sterile neutrinos, focusing on direct experimental searches and neutrinoless double beta decay. Working in a phenomenological parametrization, we emphasize the importance of the nature of sterile neutrinos in interpreting neutrinoless double beta decay searches.
Bolton, Patrick D. +2 more
core +6 more sources
Probing heavy sterile neutrinos at neutrino telescopes via the dipole portal [PDF]
Physics Letters B, 2023 The question of how heavy a sterile neutrino can be probed in experiments leads us to investigate the Primakoff production of heavy sterile neutrinos from ultrahigh-energy neutrinos via the magnetic dipole portal. Despite the suppression from the small magnetic moment, the transition is significantly enhanced by tiny t-channel momentum transfers ...
Guo-yuan Huang +3 more
openaire +4 more sources
Search for heavy sterile neutrinos in trileptons at the LHC
Chinese Physics C, 2017 We present a search strategy for both Dirac and Majorana sterile neutrinos from the purely leptonic decays of $W^\pm \to e^\pm e^\pm μ^\mp ν$ and $μ^\pm μ^\pm e^\mp ν$ at the 14 TeV LHC. The discovery and exclusion limits for sterile neutrinos are shown using both the Cut-and-Count (CC) and Multi-Variate Analysis (MVA) methods.
Dib, Claudio O. +2 more
core +5 more sources
Relativistic and spectator effects in leptogenesis with heavy sterile neutrinos [PDF]
Journal of High Energy Physics, 2020 Abstract 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. This can occur for weak washout or when the asymmetry is partly protected by being transferred to spectator fields.
Garbrecht, Björn +2 more
openaire +4 more sources
Heavy Sterile Neutrino in Dark Matter Searches [PDF]
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 Sterile neutrinos are possible dark matter candidates. We examine here possible detection mechanisms, assuming that the neutrino has a mass of about 50 keV and couples to the ordinary neutrino. Even though this neutrino is quite heavy, it is nonrelativistic with a maximum kinetic energy of 0.1 eV.
Paraskevi C. Divari +2 more
wiley +4 more sources
Signatures of heavy sterile neutrinos at long baseline experiments [PDF]
Physical Review D, 2007 Sterile neutrinos with masses $\sim 0.1$ eV or higher would play an important role in astrophysics and cosmology. We explore possible signatures of such sterile neutrinos at long baseline experiments. We determine the neutrino conversion probabilities analytically in a 4-neutrino framework, including matter effects, treating the sterile mixing angles ...
Dighe, Amol, Ray, Shamayita
openaire +3 more sources
Emergent neutrinos from heavy messengers [PDF]
Journal of High Energy Physics, 2022 Fermionic bound states (mesinos) of messengers can play the role of right-handed neutrinos and due to their heavy masses they can realize the seesaw mechanism providing light and heavy sterile neutrinos.
Pascal Anastasopoulos, Elias Kiritsis
doaj +2 more sources
Electromagnetic leptogenesis with light-heavy sterile neutrinos
Physics Letters B8 pages, 7 captioned figures, matches version accepted for publication in Phys.
Debasish Borah, Arnab Dasgupta
openaire +4 more sources
Charged lepton mixing via heavy sterile neutrinos [PDF]
Nuclear Physics B, 2014 Pseudoscalar meson decay leads to an entangled state of charged leptons ($μ,e$) and massive neutrinos. Tracing out the neutrino degrees of freedom leads to a reduced density matrix for the charged leptons whose off-diagonal elements reveal \emph{charged lepton oscillations}.
Lello, Louis, Boyanovsky, Daniel
openaire +3 more sources
Heavy sterile neutrinos, entropy and relativistic energy production, and the relic neutrino background [PDF]
, 2011 18 pages, 12 ...
Fuller, George M +2 more
core +5 more sources