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23 papers · 2 filters
Lepton number violating effects in neutrino oscillations
Sebastian Hollenberg, Octavian Micu, Palash B. Pal
We develop a non-adiabatic perturbation theory for oscillations involving an arbitrary number of neutrino and antineutrino species, including the possibility of lepton number viola…
A model of superluminal neutrinos
D. Marfatia, H. Päs, S. Pakvasa +1
Motivated by the tentative observation of superluminal neutrinos by the OPERA experiment, we present a model of active-sterile neutrino oscillations in which sterile neutrinos are…
The Decay B --> K l^+ l^- at Low Hadronic Recoil and Model-Independent Delta B = 1 Constraints
Christoph Bobeth, Gudrun Hiller, Danny van Dyk +1
We study the decay B --> K l^+ l^- for l = e,mu,tau with a softly recoiling kaon, that is, for high dilepton invariant masses sqrt{q^2} of the order of the b-quark mass. This kinem…
Gravitino cosmology with a very light neutralino
Herbi K. Dreiner, Marja Hanussek, Jong-Soo Kim +1
It has been shown that very light or even massless neutralinos are consistent with all current experiments, given non-universal gaugino masses. Furthermore, a very light neutralino…
Non-Abelian family symmetries in Pati-Salam unification
Ivo de Medeiros Varzielas
We present a framework of underlying SU(3) x SU(3) family symmetries consistent with Pati-Salam unification and discuss advantages that can justify introducing multiple non-Abelian…
Baryon asymmetry of the universe and new neutrino states
Sebastian Hollenberg, Heinrich Päs, Dario Schalla
The presence of additional neutrino states with masses in the GeV range is allowed by electro-weak precision observables. However, these additional states can lead to lepton number…