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Emergent neutrinos from heavy messengers
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 +4 more sources
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
openaire +3 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
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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
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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
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Neutrinoless double beta decay versus other probes of heavy sterile neutrinos [PDF]
Journal of High Energy Physics, 2020 Abstract We make a comparative study of the neutrinoless double beta decay constraints on heavy sterile neutrinos versus other direct and indirect constraints from both lepton number conserving and violating processes, as a sensitive probe of the extent of lepton number violation and possible interference effects in the sterile ...
Bolton, PD, Deppisch, FF, Dev, PSB
openaire +6 more sources
Charged lepton mixing via heavy sterile neutrinos
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
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Heavy sterile neutrinos, entropy and relativistic energy production, and the relic neutrino background [PDF]
, 2011 18 pages, 12 ...
Fuller, George M +2 more
openaire +4 more sources