4 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 th…