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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
Constraining super-light sterile neutrinos at Borexino and KamLAND
Journal of High Energy Physics, 2022 The presence of a super-light sterile neutrino can lead to a dip in the survival probability of solar neutrinos, and explain the suppression of the upturn in the low energy solar neutrino data.
Zikang Chen +3 more
doaj +1 more source
Scenario of light sterile neutrinos with a heavy tau neutrino in a supersymmetric model [PDF]
Nuclear Physics B, 2001 Three light sterile neutrinos (ν_e^s, ν_μ^s and ν_τ^s) are introduced to accommodate all the available neutrino data: the atmospheric neutrino anomaly is explained by ν_μ-ν_μ^s oscillation with maximal mixing; the solar one is due to ν_e-ν_e^s oscillation of small angle Mikheyev-Smirnov-Wolfenstein type; the Liquid Scintillation Neutrino Detector data ...
Liu, Chun, Song, Jeonghyeon
openaire +2 more sources
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
Heavy sterile neutrinos in tau decays and the MiniBooNE anomaly [PDF]
Physical Review D, 2012 Current results of the MiniBooNE experiment show excess events that indicate neutrino oscillations, but only if one goes beyond the standard 3 family scenario. Recently a different explanation of the events has been given, not in terms of oscillations but by the production and decay of a massive sterile neutrino with large transition magnetic moment ...
Dib, Claudio +4 more
openaire +7 more sources
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 sterile neutrinos and neutrinoless double beta decay [PDF]
Nuclear Physics B, 1995 We investigate the possibility of producing neutrinoless double beta decay without having an electron neutrino with a mass in the vicinity of 1 eV. We do so by having a much lighter electron neutrino mix with a much heavier (m > 1 GeV) sterile neutrino.
Bamert, P. +2 more
openaire +2 more sources
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
Neutrinoless double beta decay and heavy sterile neutrinos [PDF]
Nuclear Physics B, 2012 The experimental rate of neutrinoless double beta decay can be saturated by the exchange of virtual sterile neutrinos, that mix with the ordinary neutrinos and are heavier than 200 MeV. Interestingly, this hypothesis is subject only to marginal experimental constraints, because of the new nuclear matrix elements.
Mitra, Manimala +2 more
openaire +2 more sources
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