The effective Lagrangian for the seesaw model of neutrino mass and leptogenesis

被引:98
作者
Broncano, A [1 ]
Gavela, MB
Jenkins, E
机构
[1] Univ Autonoma Madrid, Fac Ciencias, Dept Fis Teor, E-28049 Madrid, Spain
[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
关键词
D O I
10.1016/S0370-2693(02)03130-1
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The effective Lagrangian for the seesaw model is derived including effects due to CP-violation. Besides the usual dimension-5 operator responsible for light neutrino masses, a dimension-6 operator is obtained. For three or less heavy neutrino generations, the inclusion of both operators is necessary and sufficient for all independent physical parameters of the high-energy seesaw Lagrangian to appear in the low-energy effective theory, including the CP-odd phases relevant for leptogenesis. The dimension-6 operator implies exotic low-energy couplings for light neutrinos, providing a link between the high-energy physics and low-energy observables. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:177 / 184
页数:8
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