Texture of single vanishing subtrace in neutrino mass matrix

摘要

We consider a texture for the neutrino mass matrix characterized by one vanishing 2 × 2 subtrace. We?analyze phenomenologically and analytically all the six possible patterns, and show that all nonsingular ones are able to accommodate the experimental bounds, whereas singular patterns allow for only four inverted-hierarchy type textures. We then present some possible realizations of this texture, within seesaw scenarios, either directly or indirectly by relating it to zero textures.