41 citations · 70 across the 6 of their papers we have counts for
6 papers
Archimedean Seesaw: Small Neutrino Masses and Large Lepton-number Violation
Tao Han, Alejandro Ibarra, Subhojit Roy +1
Contrary to the common lore that observable lepton-number violation (LNV) is inevitably suppressed by tiny neutrino masses, we identify a class of seesaw models in which arbitraril…
Leptogenesis without on-shell right-handed neutrinos
Simon Cléry, Alejandro Ibarra, Onur Yonar
We propose a novel mechanism for generating the baryon asymmetry of the Universe through leptogenesis in a scenario where the right-handed neutrinos are heavier than the maximal te…
Quantum effects on neutrino parameters from a flavored gauge boson
Alejandro Ibarra, Lukas Treuer
We calculate the one-loop renormalization group equations of the neutrino mass matrix when the Standard Model particle content is extended with a massive gauge boson which has fami…
Prospects for detecting the rare heavy Higgs decay through the channel at the LHC
M. A. Arroyo-Ureña, Alejandro Ibarra, Pablo Roig +1
We study the decay of a heavy CP-even neutral Higgs into an on-shell Standard Model-like Higgs boson and two photons, , in the two-Higgs doublet model. We argue that the…
Hints on the high-energy seesaw mechanism from the low-energy neutrino spectrum
J. A. Casas, A. Ibarra, F. Jimenez-Alburquerque
It is an experimental fact that the mass ratio for the two heavier neutrinos, h = m_3/m_2 < 6, is much smaller than the typical quark and lepton hierarchies, which are O(20-300). W…
Theoretical Constraints on the Vacuum Oscillation Solution to the Solar Neutrino Problem
J. A. Casas, J. R. Espinosa, A. Ibarra +1
The vacuum oscillation (VO) solution to the solar anomaly requires an extremely small neutrino mass splitting, Delta m^2_{sol}\leq 10^{-10} eV^2. We study under which circumstances…