Results 11 to 20 of about 9,015 (168)

Sterile neutrinos: the dark side of the light fermions

Physics Reports, 2009
The discovery of neutrino masses suggests the likely existence of gauge singlet fermions that participate in the neutrino mass generation via the seesaw mechanism.
Abazajian, Abazajian, Abazajian, Abazajian, Abazajian, Abazajian, Affleck, Aguilar-Arevalo, Ahriche, Akhmedov, Alexander Kusenko, Appelquist, Appelquist, Appelquist, Arkani-Hamed, Arzoumanian, Asaka, Asaka, Asaka, Asaka, Asaka, Astier, Athanassopoulos, Athanassopoulos, Athanassopoulos, Athanassopoulos, Atre, Babu, Babu, Baranov, Barbieri, Barbieri, Barger, Barger, Barkovich, Barkovich, Barkovich, Beacom, Bernardi, Bernardi, Bertone, Bezrukov, Biermann, Bionta, Blandford, Blondin, Blondin, Bode, Boyanovsky, Boyanovsky, Boyanovsky, Boyarsky, Boyarsky, Boyarsky, Boyarsky, Boyarsky, Boyarsky, Caldwell, Candelas, Chikashige, Connerney, Cordes, Cordes, Cowsik, Cuesta, Dalcanton, Datta, de Gouvea, Dine, Disney, Dodelson, Dodelson, Dolgov, Dolgov, Dolgov, Dorofeev, Duncan, D’Olivo, D’olivo, Elliott, Enqvist, Enqvist, Esposito, Eyton-Williams, Falk, Farzan, Farzan, Fetter, Finocchiaro, Fomalont, Frampton, Fryer, Fryer, Fryer, Fujikawa, Fukugita, Fuller, Galt, Gao, Gelmini, Gelmini, Gentile, Gershtein, Gilmore, Glashow, Goerdt, Goldreich, Gott, Governato, Ham, Hannestad, Hansen, Harrison, Harrison, Hebecker, Hidaka, Hidaka, Hirata, Holme, Horvat, Hungerford, Johnston, Kadota, Kainulainen, Kauffmann, Kirilova, Kishimoto, Kishimoto, Klypin, Kolb, Kouveliotou, Kusenko, Kusenko, Kusenko, Kusenko, Kusenko, Kusenko, Kusenko, Kusenko, Kuzmin, Laine, Lee, Loewenstein, Loewenstein, Loveridge, Lozinskaya, Lyne, Lyne, Lyne, Mapelli, McDonald, McDonald, McLaughlin, Mezzacappa, Mikheev, Minkowski, Mirabelli, Mohapatra, Moore, Mosquera Cuesta, Mosquera Cuesta, Mosquera Cuesta, Murphy, Nedelec, Ness, Ng, Ng, Ng, Nieves, Nieves, Nieves, Nieves, Nieves, Nunokawa, Pal, Palazzo, Park, Petraki, Petraki, Pontecorvo, Profumo, Profumo, Rickett, Riemer-Sørensen, Riemer-Sørensen, Romani, Ruzmaikin, Schechter, Scheck, Scheuer, Schinder, Seljak, Seljak, Shaposhnikov, Shaposhnikov, Shi, Shi, Shklovskii, Shrock, Simon, Smirnov, Smith, Sommer-Larsen, Stasielak, Stodolsky, Strigari, Suzuki, t Hooft, Tanaka, Tegmark, Tremaine, Valdes, Van Der Velde, Viel, Viel, Vilenkin, Vilja, Voloshin, Wang, Watson, Wolfenstein, Zatsepin, Zeldovich, Zentner   +223 more
core   +3 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, Luca Merlo, Stefan Pokorski   +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, Luca Merlo, Jean‐Loup Tastet   +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

Assessment of the dimension-5 seesaw portal and impact of exotic Higgs decays on non-pointing photon searches

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, L. Duarte, J. Jones-Pérez, C. Manrique-Chavil, S. Peña   +4 more
doaj   +1 more source

Full parametrization of the6×6flavor mixing matrix in the presence of three light or heavy sterile neutrinos [PDF]

Physical Review D, 2012
In addition to three active neutrinos, one or more light sterile neutrinos have been conjectured to account for the LSND, MiniBooNE and reactor antineutrino anomalies (at the sub-eV mass scale) or for warm dark matter in the Universe (at the keV mass scale). Heavy Majorana neutrinos at or above the TeV scale have also been assumed in some seesaw models.
openaire   +2 more sources

Neutrino Masses in the Effective Rank-5 Subgroups of E_6 I: Non-supersymmetric Case [PDF]

, 2005
The neutral fermion sectors of E_6-inspired low energy models, in particular the Alternative Left-Right and Inert models, are considered in detail within the non-supersymmetric scenario.
Frank, Mariana, Sher, Marc, Turan, Ismail   +2 more
core   +2 more sources

Constraints on NJL four-fermion effective interactions from neutrinoless double beta decay

Journal of High Energy Physics, 2023
We study the contribution of a heavy right-handed Majorana neutrino to neutrinoless double beta decay (0νββ) via four-fermion effective interactions of Nambu-Jona-Lasinio (NJL) type.
L. Pacioselli, O. Panella, M. Presilla, S.-S. Xue   +3 more
doaj   +1 more source

Signatures of Dirac and Majorana Sterile Neutrinos in Trilepton Events at the LHC [PDF]

, 2017
Heavy sterile neutrinos with masses below $M_W$ can induce trilepton events at the 14 TeV LHC through purely leptonic $W$ decays of $W^\pm \to e^\pm e^\pm \mu^\mp \nu$ and $\mu^\pm \mu^\pm e^\mp \nu$ where the heavy neutrino will be in an intermediate ...
Dib, Claudio O., Kim, C. S., Wang, Kechen   +2 more
core   +1 more source