Eur. Phys. J. C (2011) 71: 1772
https://doi.org/10.1140/epjc/s10052-011-1772-5

Regular Article - Theoretical Physics

Neutrino masses and flavor mixing in the Extended Double Seesaw Model with two texture zeros

¹ College of Nuclear Science and Technology, Beijing Normal University, Beijing, 100875, China
² School of Physical Science and Technology, Xinjiang University, Urumchi, 830046, China
³ Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, CAS, Beijing, 100049, China

^* e-mail: hulj@sina.cn

Received: 8 January 2011
Revised: 13 September 2011
Published online: 18 October 2011

Abstract

We study the light neutrino mass matrix in the Extended Double Seesaw Model (EDSM), and as a result we get its general form. Also we demonstrate that conventional type-I and double seesaw mechanisms can be regarded as two special cases. We analyze the structure of the 9×9 neutrino mass matrix in this scenario, and surprisingly we find that EDSM will degenerate to a conventional type-I seesaw mechanism when holds exactly. Considering two simple ansätze in two texture zeros for its 3×3 submatrices, we calculate the neutrino masses and flavor mixing angles, in which the θ ₁₃ is a nonzero large angle.