Results 121 to 130 of about 6,824 (208)

Coherent collision integrals for neutrino transport equations

Journal of High Energy Physics
We present quantum kinetic equations for neutrinos and derive Feynman rules for computing scattering rates involving coherent states. Our rules encompass both flavour- and particle-antiparticle coherence and allow writing down the scattering matrix ...
Kimmo Kainulainen, Harri Parkkinen
doaj   +1 more source

Searches for sterile neutrinos with IceCube

, 2017
Sterile neutrinos are a hypothetical additional neutrino species that do not interact via weak interactions. They can resolve anomalies observed in the data of short baseline, reactor and radio-chemical neutrino experiments.
IceCube Collaboration, Terliuk, Andrii
core   +1 more source

Testing the heavy decaying sterile neutrino hypothesis at the DUNE near detector

Journal of High Energy Physics
A bstract One of the most convincing explanations of the LSND and MiniBooNE anomalies relies on a heavy, mostly sterile neutrino with a small muon neutrino component, which decays to an electron neutrino and an invisible light scalar field. We investigate
Sabya Sachi Chatterjee, Stéphane Lavignac, O. G. Miranda   +2 more
openaire   +2 more sources

Neutrino properties from muonium-antimuonium mixing

Journal of High Energy Physics
The nature of neutrino mass — whether neutrinos are Dirac or Majorana particles — remains one of the central open questions in particle physics. While observation of neutrinoless double beta decay would confirm the Majorana case, the absence of a signal ...
Mitrajyoti Ghosh, Kevin Liguori, Takemichi Okui, Kohsaku Tobioka   +3 more
doaj   +1 more source

Revisiting cosmological bounds on sterile neutrinos

, 2016
We employ state-of-the art cosmological observables including supernova surveys and BAO information to provide constraints on the mass and mixing angle of a non-resonantly produced sterile neutrino species, showing that cosmology can effectively rule out
Lattanzi, Massimiliano, Mena Requejo, Olga, Vincent, Aaron C., Hernández Gamazo, Pilar, Fernández Martínez, Enrique   +4 more
core   +1 more source

Threshold effects on the massless neutrino in the canonical seesaw mechanism

Journal of High Energy Physics
In this work, we revisit the one-loop renormalization group equations (RGEs) among non-degenerate seesaw scales, i.e., threshold effects in the canonical seesaw mechanism, which have been obtained for more than two decades.
Di Zhang
doaj   +1 more source

Quantum transport theory for neutrinos with flavor and particle-antiparticle mixing

Journal of High Energy Physics
We derive quantum kinetic equations for mixing neutrinos including consistent forward scattering terms and collision integrals for coherent neutrino states.
Kimmo Kainulainen, Harri Parkkinen
doaj   +1 more source

Seeking sterile neutrinos in Finslerian cosmology

, 2017
For the first time, to search for sterile neutrinos in the framework of Finler geometry, we constrain four cosmological models using the most stringent constraint we can provide so far.
Deng Wang, Xin-He Meng
core   +1 more source

Two portals to GeV sterile neutrinos: Dipole versus mixing

Massive sterile neutrinos, also known as heavy neutral leptons, can have a mixing with active neutrinos, $\theta$, as well as a dipole coupling to the photon, $d$.
Enrico Bertuzzo, Michele Frigerio
core   +1 more source

Sterile Neutrinos

, 2011
In following we explain the necessity of existence of neutrinos and explain the theoretical basis of neutrino oscillations in vacuum and matter.
Liluashvili, A.
core