Perturbative bottom-up approach for neutrino mass matrix in light of large θ13 and role of lightest neutrino mass

被引：6

作者：

Dutta, Rupak ^{[1
]}

Upender, Ch ^{[1
]}

Giri, Anjan K. ^{[1
]}

Sahu, Narendra ^{[1
]}

机构：

[1] Indian Inst Technol Hyderabad, Yeddumailaram 502205, AP, India

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2014年 / 29卷 / 22期

关键词：

Neutrino masses and mixings; tribimaximal mixing; perturbative bottom-up approach; CP-VIOLATION; SYMMETRY; A(4); OSCILLATIONS; MIXINGS; MODEL;

D O I：

10.1142/S0217751X14501139

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We discuss the role of lightest neutrino mass (m(0)) in the neutrino mass matrix, defined in a flavor basis, through a bottom-up approach using the current neutrino oscillation data. We find that if m(0) < 10(-3) eV, then the deviation delta M-nu in the neutrino mass matrix from a tree-level, say tribimaximal neutrino mass matrix, does not depend on m(0). As a result delta M-nu's are exactly predicted in terms of the experimentally determined quantities such as solar and atmospheric mass squared differences and the mixing angles. On the other hand for m(0) greater than or similar to 10(-3) eV, delta M-nu strongly depends on m(0) and hence cannot be determined within the knowledge of oscillation parameters alone. In this limit, we provide an exponential parametrization for delta M-nu for all values of m(0) such that it can factorize the m(0) dependency of delta M-nu from rest of the oscillation parameters. This helps us in finding delta M-nu as a function of the solar and atmospheric mass squared differences and the mixing angles for all values of m(0). We use this information to build up a model of neutrino masses and mixings in a top-down scenario which can predict large theta(13) perturbatively.

引用

页数：23

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