M. Zralek

Matter effects and CP violating neutrino oscillations with nondecoupling heavy neutrinos

The evolution equation for active and sterile neutrinos propagating in a general anisotropic or polarized background environment is found and solved for a special case when heavy neutrinos do not decouple, resulting in nonunitary mixing among light neutrino states. Then new

Left-right symmetry and heavy particle quantum effects

\mathrm{CP}

In quest of neutrino masses at O (eV) scale

violating neutrino oscillation effects appear. In contrast with the standard unitary neutrino oscillations these effects can be visible even for two flavor neutrino transitions and even if one of the elements of the neutrino mixing matrix is equal to zero. They do not necessarily vanish with

Low energy physics and left-right symmetry: bounds on the model parameters

\ensuremath{\delta}{m}^{2}\ensuremath{\rightarrow}0

Heavy neutrino mixing and single production at linear collider

and they are different for various pairs of flavor neutrino transitions

Nature of neutrinos in the light of present and future experiments

({\ensuremath{\nu}}_{e}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\ensuremath{\mu}}),

Neutrino magnetic moments in left-right symmetric models

({\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\ensuremath{\tau}}),

Heavy Majorana neutrino production and decay in futuree+e−colliders

({\ensuremath{\nu}}_{\ensuremath{\tau}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{e}).