Results 71 to 80 of about 42,326 (173)

Light Sterile Neutrinos

, 2016
The theory and phenomenology of light sterile neutrinos at the eV mass scale is reviewed. The reactor, gallium and Liquid Scintillator Neutrino Detector anomalies are briefly described and interpreted as indications of the existence of short-baseline ...
LAVEDER, MARCO, Li, Y. F, Giunti, C, Zavanin, E. M., Gariazzo, S, Gariazzo, E. M., C.; Laveder, M.; Li, Gariazzo, Stefano, Y. F.; Zavanin, S.; Giunti   +11 more
core   +2 more sources

Bounding the Dimension-5 Seesaw Portal with non-pointing photon searches

Journal of High Energy Physics
The addition of d = 5 operators to the Seesaw model leads to the Dimension-5 Seesaw Portal. Here, two new operators provide interactions for the heavy sterile neutrinos.
L. Duarte, J. Jones-Pérez, C. Manrique-Chavil   +2 more
doaj   +1 more source

Heavy sterile neutrinos, entropy and relativistic energy production, and the relic neutrino background [PDF]

, 2011
We explore the implications of the existence of heavy neutral fermions (i.e., sterile neutrinos) for the thermal history of the early universe. In particular, we consider sterile neutrinos with rest masses in the 100 MeV to 500 MeV range, with couplings ...
Kusenko, Alexander, Kishimoto, Chad T, Fuller, George M   +2 more
core   +1 more source

Light sterile neutrinos: models and phenomenology [PDF]

, 2011
Motivated by recent hints in particle physics and cosmology, we study the realization of eV-scale sterile neutrinos within both the seesaw mechanism and flavor symmetry theories.
Barry, J., He Zhang, Rodejohann, W., Zhang, H., Werner Rodejohann, James Barry   +5 more
core   +1 more source

Sterile neutrinos, dark matter and Standard Model extended by right-handed neutrinos [PDF]

Joint analysis of the results of the Neutrino-4 experiment and the data of the GALLEX, SAGE and BEST experiments confirms the parameters of neutrino oscillations declared by the Neutrino-4 experiment $(\Delta m_{14}^2= 7.3 \text{eV}^2$ and $\sin^2 2 ...
Serebrov, A. P., Zherebtsov, O. M., Samoilov, R. M., Budanov, N. S.   +3 more
core   +1 more source

Signatures of heavy sterile neutrinos at long baseline experiments

, 2007
Sterile neutrinos with masses ~0.1  eV or higher, allowed with the current oscillation data, can potentially play an important role in astrophysics and cosmology. We explore possible signatures of such sterile neutrinos at long baseline experiments.
Dighe, Amol, Ray, Shamayita
core   +1 more source

Sterile neutrinos in cosmology [PDF]

, 2017
Sterile neutrinos are natural extensions to the standard model of particle physics in neutrino mass generation mechanisms. If they are relatively light, less than approximately 10 keV, they can alter cosmology significantly, from the early Universe to ...
Abazajian, KN, Abazajian, KN,, Kevork N. Abazajian   +2 more
core   +1 more source

Freeze-in leptogenesis with sterile neutrino self-interactions

Journal of High Energy Physics
Sterile neutrinos are a simple yet compelling addition to the Standard Model. For right-handed neutrinos with masses below the electroweak scale, leptogenesis can proceed through CP-violating oscillations of the sterile neutrinos. This is known as ARS or
María Dias Astros, Stefan Vogl
doaj   +1 more source

Heavy neutral leptons and top quarks in effective field theory

Journal of High Energy Physics
We study the phenomenology of heavy neutral leptons (HNLs) at the LHC in effective field theory, concentrating on d = 6 operators with top quarks.
Rebeca Beltrán, Giovanna Cottin, Julian Günther, Martin Hirsch, Arsenii Titov, Zeren Simon Wang   +5 more
doaj   +1 more source

Higgs production from sterile neutrinos at future lepton colliders [PDF]

, 2016
In scenarios with sterile (right-handed) neutrinos that are subject to an approximate “lepton-number-like” symmetry, the heavy neutrinos (i.e. the mass eigenstates) can have masses around the electroweak scale and couple to the Higgs boson with, in ...
Eros Cazzato, Fischer, Oliver, Oliver Fischer, Stefan Antusch, Cazzato, Eros, Antusch, Stefan   +5 more
core   +1 more source