A discrete symmetry group for maximal atmospheric neutrino mixing

被引:245
作者
Grimus, W
Lavoura, L
机构
[1] Univ Vienna, Inst Theoret Phys, A-1090 Vienna, Austria
[2] Univ Tecn Lisboa, Ctr Fis Interaccoes Fundamentais, Inst Super Tecn, P-1049001 Lisbon, Portugal
关键词
D O I
10.1016/j.physletb.2003.08.032
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We propose a discrete non-abelian symmetry group which enforces maximal atmospheric neutrino mixing, while theta(13) = 0 and the solar mixing angle theta(12) remains undetermined; without finetuning, theta(12) will be large but non-maximal. Our extension of the Standard Model has three right-handed neutrino singlets upsilon(R) and implements the seesaw mechanism. Furthermore, we have an enlarged scalar sector with three Higgs doublets and two scalar gauge singlets; the latter have masses and vacuum expectation values of the order of the seesaw scale. Lepton mixing stems exclusively from the upsilon(R) Majorana mass matrix, where non-diagonal elements are generated by the vacuum expectation values of the scalar singlets. The model predicts a neutrino mass spectrum with m(3) > m(2) > m(1), and the effective Majorana mass of neutrinoless betabeta decay is equal to m(1)/m(2)/m(3). (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:189 / 195
页数:7
相关论文
共 37 条
[1]  
ALBRIGHT C, HEPPH0212090
[2]   Neutrino masses and mixings: a theoretical perspective [J].
Altarelli, G ;
Feruglio, F .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1999, 320 (1-6) :295-318
[3]  
ALTARELLI G, IN PRESS SPRINGER TR
[4]  
ALTARELLI G, HEPPH0206077
[5]   Underlying A4 symmetry for the neutrino mass matrix and the quark mixing matrix [J].
Babu, KS ;
Ma, E ;
Valle, JWF .
PHYSICS LETTERS B, 2003, 552 (3-4) :207-213
[6]   Bimaximal neutrino mixings from lopsided mass matrices [J].
Babu, KS ;
Barr, SM .
PHYSICS LETTERS B, 2002, 525 (3-4) :289-296
[7]   The solar LMA neutrino oscillation solution in the Zee model [J].
Balaji, KRS ;
Grimus, W ;
Schwetz, T .
PHYSICS LETTERS B, 2001, 508 (3-4) :301-310
[8]   A general classification of three-neutrino models and Ue3 [J].
Barr, SM ;
Dorsner, I .
NUCLEAR PHYSICS B, 2000, 585 (1-2) :79-104
[9]  
BARR SM, 2001, NOON2001 C TOK DEC 5
[10]  
Bilenky S. M., 1978, Physics Reports. Physics Letters Section C, V41c, P225, DOI 10.1016/0370-1573(78)90095-9