SSP2012 - 5th International Symposium on Symmetries in Subatomic Physics

The MAJORANA collaboration is actively pursuing research and development aimed at a tonne-scale 76Ge neutrinoless double-beta decay (bb(0n)-decay) experiment. The current, primary focus is the construction of the MAJORANA DEMONSTRATOR experiment, an R&D effort that will field approximately 40kg of germanium detectors with mixed enrichment levels. This article provides a status update on...

NOvA is a long-baseline neutrino experiment designed to study nu_mu --> nu_e and anti-nu_mu --> anti-nu_e oscillations. It will measure the neutrino mixing angle theta_13 with a high precision, probe the neutrino mass hierarchy, and search for CP violation in neutrino oscillations. The experiment consists of two detectors. The Near Detector will be located at Fermilab close to the source of...

We try to envision that there might be a dark-matter world and neutrinos, especially the right-handed ones, might be coupled directly with particles in the dark-matter world. This means that the minimal Standard Model [1], which describes the ordinary-matter world to begin with, should be extended in some way. Our candidate theory would be the extended Standard Model based on $SU_c(3)...

We discuss the interplay between lepton asymmetry L and neutrino oscillations in the early Universe. Neutrino oscillations may suppress or enhance previously existing L. On the other hand L is capable to suppress or enhance neutrino oscillations. The mechanism of L enhancement in resonant neutrino oscillations in the early Universe is numerically analyzed. Lepton asymmetry cosmological...

We argue that the present classical formalism of neutrino oscillations is just approximate (cf. PDG 2006), thus still requiring various second-order corrections : internal momentum dispersion from internal mass dispersion ; apparent violation of Lorentz invariance, in transitions of the kind m1 => m2 , between different mass eigenstates, salient in phase factors through the energy shifts ...