Results 1 to 10 of about 9,004 (197)

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.
Zhi‐zhong Xing
openaire   +4 more sources

Heavy sterile neutrinos: Bounds from big-bang nucleosynthesis and SN 1987A [PDF]

, 2000
Cosmological and astrophysical effects of heavy (10 - 200 MeV) sterile Dirac neutrinos, mixed with the active ones, are considered. The bounds on mass and mixing angle from both supernovae and big-bang nucleosynthesis are presented.Comment: 19 pages, 5 ...
A.D. Dolgov, Ahluwalia, Armbruster, Barate, Barbieri, Barger, Barger, Conrad, D.V. Semikoz, Dolgov, Dolgov, Dolgov, Dolgov, Dolgov, Dolgov, Eitel, Eitel, Ellis, Enqvist, Fishbach, G. Raffelt, Kainulainen, Kalogeropoulous, Lobashev, Nötzold, S.H. Hansen, Weinheimer, Weinheimer   +27 more
core   +4 more sources

New limits on heavy sterile neutrino mixing in ${^{8}\rm{B}}$-decay obtained with the Borexino detector [PDF]

, 2013
If heavy neutrinos with mass $m_{\nu_{H}}\geq$2$ m_e $ are produced in the Sun via the decay ${^8\rm{B}} \rightarrow {^8\rm{Be}} + e^+ + \nu_H$ in a side branch of pp-chain, they would undergo the observable decay into an electron, a positron and a light
Avanzini, M. Buizza, Bellini, G., Benziger, J., Bick, D., Bonfini, G., Borexino collaboration, Bravo, D., Caccianiga, B., Cadonati, L., Calaprice, F., Cavalcante, P., Chavarria, A., Chepurnov, A., DAngelo, D., Davini, S., Derbin, A., Drachnev, I., Empl, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Goger-Neff, M., Goretti, A., Grandi, L., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Meindl, Q., Meroni, E., Miramonti, L., Misiaszek, M., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Perasso, S., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schonert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., Zuzel, G.   +89 more
core   +4 more sources

Matter effects of sterile neutrino in light of renormalization-group equations

Journal of High Energy Physics, 2022
The renormalization-group equation (RGE) approach to neutrino matter effects is further developed in this work. We derive a complete set of differential equations for effective mixing elements, masses and Jarlskog-like invariants in presence of a light ...
Shuge Zeng, Fanrong Xu
doaj   +1 more source

Dynamical Minimal Flavour Violating inverse seesaw

Journal of High Energy Physics, 2022
The Inverse Seesaw mechanism is dynamically realised within the Minimal Lepton Flavour Violation context. Lepton number, whose breaking is spontaneously realised, is generalised to a global Abelian factor of the whole flavour symmetry, that also plays ...
Fernando Arias-Aragón, Enrique Fernández Martínez, Manuel González-López, Luca Merlo   +3 more
doaj   +1 more source

Right-handed Dirac and Majorana neutrinos at Belle II

Journal of High Energy Physics, 2023
We assess the ability of the Belle II experiment to probe the Dirac or Majorana nature of a massive right-handed neutrino (RHN) N in the MeV to GeV mass range.
Tao Han, Jiajun Liao, Hongkai Liu, Danny Marfatia   +3 more
doaj   +1 more source

More ingredients for an Altarelli cocktail at MiniBooNE

Journal of High Energy Physics, 2023
The MiniBooNE excess persists as a significant puzzle in particle physics. Given that the MiniBooNE detector cannot discriminate between electron-like signals and backgrounds due to photons, the goal of this work is to study photon backgrounds in ...
Kevin J. Kelly, Joachim Kopp
doaj   +1 more source

Sterile neutrinos: propagation in matter and sensitivity to sterile mass ordering

Journal of High Energy Physics, 2023
We analytically calculate the neutrino conversion probability P μe in the presence of sterile neutrinos, with exact dependence on ∆ m 41 2 $$ \Delta {m}_{41}^2 $$ and with matter effects explicitly included.
Dibya S. Chattopadhyay, Moon Moon Devi, Amol Dighe, Debajyoti Dutta, Dipyaman Pramanik, Sushant K. Raut   +5 more
doaj   +1 more source

Search for heavy Majorana neutrinos in the τ final state at proton-electron colliders

Journal of High Energy Physics, 2023
We utilize the lepton number violation signal process p e − → τ + jjj to search for heavy Majorana neutrinos at future proton-electron colliders. The LHeC (FCC-eh) is considered to run with an electron beam energy of 60 GeV, a proton beam energy of 7 (50)
Haiyong Gu, Ying-nan Mao, Hao Sun, Kechen Wang   +3 more
doaj   +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, Jiajun Liao, Jiajie Ling, Baobiao Yue   +3 more
doaj   +1 more source