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Charged lepton mixing via heavy sterile neutrinos
Louis Lello, Daniel Boyanovsky
Pseudoscalar meson decay leads to an entangled state of charged leptons () and massive neutrinos. Tracing out the neutrino degrees of freedom leads to a reduced density matrix…
Searching for sterile neutrinos from and decays
Louis Lello, Daniel Boyanovsky
The production of heavy sterile neutrinos from decay at rest yields charged leptons with negative helicity (positive for ). We obtain the branching ratio for thi…
Spontaneous symmetry breaking in inflationary cosmology: on the fate of Goldstone Bosons
Daniel Boyanovsky
We argue that in an inflationary cosmology a consequence of the lack of time translational invariance is that spontaneous breaking of a continuous symmetry and Goldstone's theorem…
Condensates and quasiparticles in inflationary cosmology: mass generation and decay widths
Daniel Boyanovsky
During de Sitter inflation massless particles of minimally coupled scalar fields acquire a mass and a decay width thereby becoming \emph{quasiparticles}. For bare massless particle…