Scaling ansatz with texture zeros in linear seesaw

被引:13
|
作者
Chakraborty, Mainak [1 ]
Devi, H. Zeen [2 ]
Ghosal, Ambar [1 ]
机构
[1] Saha Inst Nucl Phys, Kolkata 700064, India
[2] Univ Technol & Management, Shillong 793003, Meghalaya, India
关键词
NEUTRINO; SYMMETRY; SEARCHES; TAU;
D O I
10.1016/j.physletb.2014.12.038
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate scaling ansatz with texture zeros within the framework of linear seesaw mechanism. In this variant of seesaw mechanism a simplified expression of effective neutrino mass matrix m(nu) containing two Dirac type matrices (m(D) and m(DS)) and one Majorana type matrix (m(RS)) is obtained by virtue of neglecting the global U(1)(L) symmetry breaking term in the mass term of the Lagrangian. Along with the charged lepton mass matrix, the matrix m(RS), too, is chosen in a diagonal basis whereas a scaling relation is incorporated in m(D) and m(DS) with different scale factors. Our goal in this work is to achieve a completely phenomenologically acceptable m(nu) generated by combinations of m(D) and m(DS) containing least number of independent parameters or maximum number of zeros. At the end of the numerical analysis it is found that number of zeros in any of the constituent Dirac type matrices (m(D) and m(DS)) of m(nu) cannot be greater than six in order to meet the phenomenological requirements. The hierarchy obtained here is normal and also the values of the two parameters sum mass (Sigma m(i)) and vertical bar m(nu ee)vertical bar are below the present experimental lower limit. (C) 2014 The Authors. Published by Elsevier B. V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
引用
收藏
页码:210 / 216
页数:7
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