Wolfenstein-like parametrization of the neutrino mixing matrix

被引：30

作者：

Xing, ZZ

机构：

[1] CCAST, World Lab, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2003年 / 29卷 / 09期

关键词：

D O I：

10.1088/0954-3899/29/9/316

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 show that the 3 x 3 lepton flavour mixing matrix V can be expanded in powers of a Wolfenstein-like parameter Lambda drop \V-mu3\ similar to 1/root2, which measures the strength of flavour conversion in atmospheric neutrino oscillations. The term of O(Lambda(2)) is associated with the large mixing angle in solar neutrino oscillations. The Dirac phase of CP violation enters at or below O(Lambda(8)), and the Majorana phases of CP violation are not subject to the A-expansion. Terrestrial matter effects on this new parametrization in realistic long-baseline neutrino oscillation experiments are briefly discussed. Some comments are also given on the possible relation between A and a relatively weak hierarchy of neutrino masses.

引用

页码：2227 / 2233

页数：7

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