Vanishing Effective Mass of the Neutrinoless Double Beta Decay?
High Energy Physics - Phenomenology
2009-11-10 v2
Abstract
We stress that massive neutrinos may be Majorana particles even if the effective mass of the neutrinoless double beta decay m_ee vanishes. We show that current neutrino oscillation data do allow m_ee = 0 to hold, if the Majorana CP-violating phases lie in two specific regions. Strong constraints on three neutrino masses can then be obtained. We find that the neutrino mass spectrum performs a normal hierarchy: m_1 < m_2 < m_3. A possible texture of the neutrino mass matrix is also illustrated under the m_ee = 0 condition.
Keywords
Cite
@article{arxiv.hep-ph/0305195,
title = {Vanishing Effective Mass of the Neutrinoless Double Beta Decay?},
author = {Zhi-zhong Xing},
journal= {arXiv preprint arXiv:hep-ph/0305195},
year = {2009}
}
Comments
RevTex 9 pages (2 PS figures included). More discussions and references added. Results partly changed. To appear in Phys. Rev. D