Normal vs. inverted hierarchy in type I seesaw models

被引：40

作者：

Albright, CH ^{[1
]}

机构：

[1] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA

[2] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

来源：

PHYSICS LETTERS B | 2004年 / 599卷 / 3-4期

关键词：

D O I：

10.1016/j.physletb.2004.08.050

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We demonstrate that, for every grand unified model based on a conventional type 1 seesaw mechanism leading to a normal light neutrino mass hierarchy, one can easily generate a corresponding model with an inverted hierarchy which yields the same neutrino oscillation parameters. However, the latter type model has several unattractive instabilities which will disfavor any grand unified type 1 seesaw model, if an inverted neutrino mass hierarchy is observed experimentally. This should be contrasted with the softly-broken L-e-L-mu-L-tau flavor symmetry models which are eliminated, if the data favors a normal mass hierarchy. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：285 / 293

页数：9

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