Citation
M. Czakon et al., Seesaw mechanism and four light neutrino states - art. no. 117304, PHYS REV D, 6411(11), 2001, pp. 7304
Citations number
34
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821
→ ACNP
Volume
6411
Issue
11
Year of publication
2001
Database
ISI
SICI code
0556-2821(200112)6411:11<7304:SMAFLN>2.0.ZU;2-S
Abstract
A formal proof is given that in a seesaw type neutrino mass matrix with onl
y two neutrino mass scales (m(D)<<m(R)) we cannot get a fourth light steril
e neutrino. That is, it is not possible to impose any symmetries on m(D) an
d/or m(R) matrices in order to drag a heavy state connected with the m(R) m
atrix to the low mass spectrum.