Results 11 to 20 of about 9,023 (214)
Warm dark matter sterile neutrinos in electron capture and beta decay spectra [PDF]
Advances in High Energy Physics, Volume 2017, Issue 1, 2017., 2016 We briefly review the motivation to search for sterile neutrinos in the keV mass scale, as dark matter candidates, and the prospects to find them in beta decay or electron capture spectra, with a global perspective.
de Guerra, E. Moya +2 more
core +7 more sources
Heavy Sterile Neutrino in Dark Matter Searches [PDF]
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 Sterile neutrinos are possible dark matter candidates. We examine here possible detection mechanisms, assuming that the neutrino has a mass of about 50 keV and couples to the ordinary neutrino. Even though this neutrino is quite heavy, it is nonrelativistic with a maximum kinetic energy of 0.1 eV.
Paraskevi C. Divari, John D. Vergados
openalex +2 more sources
Higher Flavor Symmetries in the Standard Model
Annalen der Physik, Volume 535, Issue 8, August 2023., 2023 The Standard Model enjoys a higher‐group symmetry which mixes the zero‐form flavor symmetries with the one‐form magnetic hyper charge symmetry. This structure greatly restricts the possible flavor symmetries that may remain unbroken in any ultraviolet completion that includes magnetic monopoles.
Clay Córdova, Seth Koren
wiley +1 more source
The Low‐Scale Seesaw Solution to the MW$M_W$ and (g−2)μ$(g-2)_\umu$ Anomalies
Fortschritte der Physik, Volume 71, Issue 4-5, May 2023., 2023 Abstract The recent CDF‐II measurement of the W‐boson mass shows a strong tension with the corresponding Standard Model prediction. Once active neutrino masses are explained in the context of the Low‐Scale Seesaw mechanisms, this tension can be resolved.
Arturo de Giorgi +2 more
wiley +1 more source
Probing HNL‐ALP Couplings at Colliders
Fortschritte der Physik, Volume 71, Issue 4-5, May 2023., 2023 Abstract Axion‐like particles (ALPs) and heavy neutral leptons (HNLs) are both well‐motivated extensions of the Standard Model. As ALPs couple to on‐shell fermions proportionally to their masses, processes involving both types of particles may give rise, for TeV HNLs, to relevant phenomenology at colliders.
Arturo de Giorgi +2 more
wiley +1 more source
Who's Afraid of the Supersymmetric Dark? The Standard Model vs Low‐Energy Supergravity
Fortschritte der Physik, Volume 70, Issue 7-8, August 2022., 2022 Abstract Use of supergravity equations in astronomy and late‐universe cosmology is often criticized on three grounds: (i) phenomenological success usually depends on the supergravity form for the scalar potential applying at the relevant energies; (ii$ii$) the low‐energy scalar potential is extremely sensitive to quantum effects involving very massive ...
C.P. Burgess, F. Quevedo
wiley +1 more source
Journal of High Energy Physics, 2022 The Dimension-5 Seesaw Portal is a Type-I Seesaw model extended by d = 5 operators involving the sterile neutrino states, leading to new interactions between all neutrinos and the Standard Model neutral bosons.
F. Delgado +4 more
doaj +1 more source
Heavy Neutral Leptons from Stopped Muons and Pions
Journal of High Energy Physics, 2023 Stopped muons, which are generic in pion-at-rest experiments, can shed light on heavy neutral leptons (HNLs) in unexplored parameter spaces. If the HNL is lighter than the muon, the HNL can be produced from decays of muons and pions.
Yohei Ema +3 more
doaj +1 more source
Michel parameters in the presence of massive Dirac and Majorana neutrinos
Journal of High Energy Physics, 2022 We analyse the effects of Dirac and Majorana neutrinos on leptonic decays of muon and tau leptons using the most general four-lepton effective interaction Hamiltonian of dimension six.
Juan Manuel Márquez +2 more
doaj +1 more source
Heavy neutrinos at future linear e+e − colliders
Journal of High Energy Physics, 2022 Neutrinos are among the most mysterious particles in nature. Their mass hierarchy and oscillations, as well as their antiparticle properties, are being intensively studied in experiments around the world.
Krzysztof Mękała +2 more
doaj +1 more source