Results 81 to 90 of about 41,177 (205)

Sterile Neutrinos with Neutrino Telescopes

, 2021
Searches for light sterile neutrinos are motivated by the unexpected observation of an electron neutrino appearance in short-baseline experiments, such as the Liquid Scintillator Neutrino Detector (LSND) and the Mini Booster Neutrino Experiment ...
Carlos A. Argüelles, Jordi Salvado
core   +1 more source

Nearly degenerate heavy sterile neutrinos in cascade decay: Mixing and oscillations [PDF]

Physical Review D, 2014
Some extensions beyond the Standard Model propose the existence of nearly degenerate heavy sterile neutrinos. If kinematically allowed these can be resonantly produced and decay in a cascade to common final states. The common decay channels lead to mixing of the heavy sterile neutrino states and interference effects.
openaire   +2 more sources

Radiative Majorana neutrino masses in a parity solution to the strong CP problem

Journal of High Energy Physics
The strong CP problem is solved in Parity symmetric theories, with the electroweak gauge group containing SU(2) L × SU(2) R broken by the minimal set of Higgs fields. Neutrino masses may be explained by adding the same number of gauge singlet fermions as
Lawrence J. Hall, Keisuke Harigaya, Yogev Shpilman   +2 more
doaj   +1 more source

Tree-level UV completions for N R SMEFT d = 6 and d = 7 operators

Journal of High Energy Physics, 2023
We study ultra-violet completions for operators in standard model effective field theory extended with right-handed neutrinos (N R SMEFT). Using a diagrammatic method, we generate systematically lists of possible tree-level completions involving scalars,
Rebeca Beltrán, Ricardo Cepedello, Martin Hirsch   +2 more
doaj   +1 more source

Phenomenology of Sterile Neutrinos at different Scales [PDF]

, 2012
Phenomenology of sterile Neutrinos at different Scales Sterile neutrinos are one of the most simple extensions of the Standard Model (SM), but they can still have a rich variety of phenomenological implications on physical observables.
Michaels, L.
core  

Semi-Contained Interactions of Atmospheric Neutrinos in the MACRO Detector [PDF]

, 2002
Atmospheric neutrinos arise from the decay of particles (primarily pions, muons and kaons) produced in the collision of high energy cosmic ray particles with the atmosphere.
Nolty, R, Nolty, Robert G.
core   +1 more source

Constraining the SMEFT extended with sterile neutrinos at FCC-ee

Journal of High Energy Physics
We investigate how extensions of the Standard Model (SM) involving heavy neutral leptons (HNLs) can be probed at FCC-ee, the proposed high-energy circular e + e − collider.
Patrick D. Bolton, Frank F. Deppisch, Suchita Kulkarni, Chayan Majumdar, Wenna Pei   +4 more
doaj   +1 more source

Long-lived HNLs via ALP portal at the LHC

Journal of High Energy Physics
Heavy neutral leptons (HNLs) and axion-like particles (ALPs) are both considered well-motivated candidates for beyond the standard model (BSM) physics. If ALPs with sizable couplings to gluons exist, they will be abundantly produced at the LHC. Therefore,
Rebeca Beltrán, Chandan Hati, Martin Hirsch, Ana Martín-Galán   +3 more
doaj   +1 more source

Supernovae and sterile neutrinos

, 2011
Motivated by the recent hints for sterile neutrinos from reactor anomalies, we discuss active-sterile conversions in an electron-capture supernova using a (2 active + 1 sterile) scenario.
Tamborra, Irene
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