Results 111 to 120 of about 6,824 (208)

Second leptogenesis: Unraveling the baryon-lepton asymmetry discrepancy

Journal of High Energy Physics
We propose a novel scenario to explain the matter-antimatter asymmetry by twofold leptogenesis, wherein heavy Majorana neutrinos exhibit temperature-dependent masses and engage in CP-violating decays.
YeolLin ChoeJo, Kazuki Enomoto, Yechan Kim, Hye-Sung Lee   +3 more
doaj   +1 more source

86th Annual Meeting of the Meteoritical Society (2024)

Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source

Production of heavy sterile neutrinos from vector boson decay at electroweak temperatures

Physical Review D, 2017
In the standard model extended with a seesaw mass matrix, we study the production of sterile neutrinos from the decay of vector bosons at $T\simeq M_{W,Z}$. We derive a general quantum kinetic equation for the production of sterile neutrinos and their effective mixing angles valid in a wide range of temperature, to all orders in interactions of the ...
Lello, Louis, Boyanovsky, Daniel, Pisarski, Robert D.   +2 more
openaire   +3 more sources

Testable inverse seesaw motivated from a high quality QCD axion

Journal of High Energy Physics
The QCD axion remains one of the most compelling solutions to the strong CP problem. Meanwhile, the type-I seesaw mechanism offers an elegant explanation for the lightness of the observed neutrino masses; however, its extremely heavy Majorana states ...
Yannis Georis, Jie Sheng, Salvador Urrea, Tsutomu T. Yanagida   +3 more
doaj   +1 more source

Sterile Neutrinos in Astrophysical Neutrino Flavor

, 2020
Current global constraints in neutrino mixing parameters translate to lax PMNS unitarity relations. In this work, we explore the lack of non-unitarity in the neutrino mixing matrix via the astrophysical neutrino flavor content in both standard paradigms,
Khandelwal Rishabh, Shivesh Mandalia, Kareem Farrag, Teppei Katori, Carlos Arguelles, Jordi Salvado   +5 more
core   +1 more source

Superluminal velocity through near-maximal neutrino oscillations or by being off shell

, 2012
Recently it was suggested that the observation of superluminal neutrinos by the OPERA collaboration may be due to group velocity effects resulting from close-to-maximal oscillation between neutrino mass eigenstates, in analogy to known effects in optics.
Morris, Tim R.
core   +1 more source

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

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

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

, 2013
If heavy neutrinos with mass $m_{ν_{H}}\geq$2$ m_e $ are produced in the Sun via the decay ${^8\rm{B}} \rightarrow {^8\rm{Be}} + e^+ + ν_H$ in a side branch of pp-chain, they would undergo the observable decay into an electron, a positron and a light neutrino $ν_{H}\rightarrowν_{L}+e^++e^-$.
Borexino collaboration, Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. Buizza, 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
openaire   +7 more sources

Neutrinoless Double Beta Decay and Heavy Sterile Neutrinos

, 2019
Presentation from Neutrino Platform Week 2019: Hot Topics in Neutrino Physics, CERN, 7-11 October ...
openaire   +2 more sources