Vanishing Effective Mass of the Neutrinoless Double Beta Decay?

Details Vanishing Effective Mass of the Neutrinoless Double Beta Decay? Vanishing Effective Mass of the Neutrinoless Double Beta Decay?

2003-05-17

arxiv.org/abs/hep-ph/0305195v2

Phys.Rev. D68 (2003) 053002

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex 9 pages (2 PS figures included). More discussions and references added. Results partly changed. To appear in Phys. Rev.

Scientific paper

10.1103/PhysRevD.68.053002

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.

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