scholarly journals Non-unitarity and sterile neutrinos at the DUNE near detector

2022 ◽  
Author(s):  
Salvador Urrea Gonzaléz
Keyword(s):  
Sterile Neutrinos ◽  
Near Detector

scholarly journals Searching for physics beyond the Standard Model in an off-axis DUNE near detector

2022 ◽  
Vol 2022 (1) ◽  
Author(s):  
Moritz Breitbach ◽  
Luca Buonocore ◽  
Claudia Frugiuele ◽  
Joachim Kopp ◽  
Lukas Mittnacht
Keyword(s):  
New Physics ◽  
Special Role ◽  
Beyond The Standard Model ◽  
Dark Sector ◽  
Primary Target ◽  
Sterile Neutrinos ◽  
Near Detector ◽  
Physics Program ◽  
Weakly Coupled ◽  
The Standard Model

Abstract Next generation neutrino oscillation experiments like DUNE and T2HK are multi-purpose observatories, with a rich physics program beyond oscillation measurements. A special role is played by their near detector facilities, which are particularly well-suited to search for weakly coupled dark sector particles produced in the primary target. In this paper, we demonstrate this by estimating the sensitivity of the DUNE near detectors to the scattering of sub-GeV DM particles and to the decay of sub-GeV sterile neutrinos (“heavy neutral leptons”). We discuss in particular the importance of the DUNE-PRISM design, which allows some of the near detectors to be moved away from the beam axis. At such off-axis locations, the signal-to-background ratio improves for many new physics searches. We find that this leads to a dramatic boost in the sensitivity to boosted DM particles interacting mainly with hadrons, while for boosted DM interacting with leptons, data taken on-axis leads to marginally stronger exclusion limits. Searches for heavy neutral leptons perform equally well in both configurations.

New results on sterile neutrinos searches

2014 ◽  
Vol 5 (9) ◽  
pp. 773-776
Author(s):  
A. T. Shaikhiev ◽  
Yu. G. Kudenko
Keyword(s):  
Sterile Neutrinos

scholarly journals Limits on the Existence of sub-MeV Sterile Neutrinos from the Decay of Be7 in Superconducting Quantum Sensors

2021 ◽  
Vol 126 (2) ◽  
Author(s):  
S. Friedrich ◽  
G. B. Kim ◽  
C. Bray ◽  
R. Cantor ◽  
J. Dilling ◽  
...  
Keyword(s):  
Sterile Neutrinos

scholarly journals Relativistic and spectator effects in leptogenesis with heavy sterile neutrinos

2020 ◽  
Vol 2020 (2) ◽  
Author(s):  
Björn Garbrecht ◽  
Philipp Klose ◽  
Carlos Tamarit
Keyword(s):  
Sterile Neutrinos

scholarly journals Two-neutrino double beta decay with sterile neutrinos

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
Patrick D. Bolton ◽  
Frank F. Deppisch ◽  
Lukáš Gráf ◽  
Fedor Šimkovic
Keyword(s):  
Beta Decay ◽  
Double Beta Decay ◽  
Sterile Neutrinos

scholarly journals Sterile Neutrinos as Dark Matter: Alternative Production Mechanisms in the Early Universe

Universe ◽  
2021 ◽  
Vol 7 (8) ◽  
pp. 264
Author(s):  
Daniel Boyanovsky
Keyword(s):  
Dark Matter ◽  
Distribution Function ◽  
Kinetic Equation ◽  
Standard Model ◽  
Early Universe ◽  
Quantum Kinetic Equation ◽  
Sterile Neutrinos ◽  
The Standard Model ◽  
Production Mechanisms ◽  
Freeze Out

We study various production mechanisms of sterile neutrinos in the early universe beyond and within the standard model. We obtain the quantum kinetic equations for production and the distribution function of sterile-like neutrinos at freeze-out, from which we obtain free streaming lengths, equations of state and coarse grained phase space densities. In a simple extension beyond the standard model, in which neutrinos are Yukawa coupled to a Higgs-like scalar, we derive and solve the quantum kinetic equation for sterile production and analyze the freeze-out conditions and clustering properties of this dark matter constituent. We argue that in the mass basis, standard model processes that produce active neutrinos also yield sterile-like neutrinos, leading to various possible production channels. Hence, the final distribution function of sterile-like neutrinos is a result of the various kinematically allowed production processes in the early universe. As an explicit example, we consider production of light sterile neutrinos from pion decay after the QCD phase transition, obtaining the quantum kinetic equation and the distribution function at freeze-out. A sterile-like neutrino with a mass in the keV range produced by this process is a suitable warm dark matter candidate with a free-streaming length of the order of few kpc consistent with cores in dwarf galaxies.

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