Results 91 to 100 of about 42,326 (173)

Impact of dim-6 νSMEFT operators on low-scale leptogenesis

Journal of High Energy Physics
We investigate the impact of higher-dimensional operators on low-scale leptogenesis (LG) via oscillations of right-handed neutrinos within the neutrino-extended Standard Model Effective Field Theory (νSMEFT) and discuss the connection to neutrinoless ...
Kaori Fuyuto, Julia Harz, Sascha Weber
doaj   +1 more source

Sterile Neutrinos [PDF]

, 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  

New parameter region in sterile neutrino searches: a scenario to alleviate cosmological neutrino mass bound and its testability at oscillation experiments

Journal of High Energy Physics
Recent high-precision cosmological data tighten the bound to neutrino masses and start rising a tension to the results of lab-experiment measurements, which may hint new physics in the role of neutrinos during the structure formation in the universe.
Toshihiko Ota
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

Measuring lepton number violation in heavy neutral lepton decays at the future muon collider

Journal of High Energy Physics
The future muon collider has the potential to discover feebly interacting particles in a wide range of masses above the electroweak scale. It is particularly suitable to search for heavy neutral leptons (HNLs), as their production cross section σ ∼ m W −
Oleksii Mikulenko, Mariia Marinichenko
doaj   +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, Frigerio, Michele, Frigerio M., Bertuzzo E., Bertuzzo, Enrico   +4 more
core   +1 more source

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

Novel signatures of heavy neutral lepton at muon collider

Journal of High Energy Physics
The Higgs-strahlung process ℓ + ℓ − → Zh is one of the most important production channels of the standard model Higgs boson h at the lepton colliders. The cross section reaches the maximum value slightly above the threshold s ~ m Z + m h $$ \sqrt{s}\sim {
Xue-Xin Zhang, Zhi-Long Han, Fei Huang, Honglei Li   +3 more
doaj   +1 more source

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

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