The effects of Majorana phases in three-generation neutrinos

Abstract

Neutrino-oscillation solutions for the atmospheric neutrino anomaly and the solar neutrino deficit can determine the texture of the neutrino mass matrix according to three types of neutrino mass hierarchies as Type A: $m_1^{}\ll m_2^{}\ll m_3^{}$, Type B: $m_1^{}\sim m_2^{}\gg m_3^{}$, and Type C: $m_1^{}\sim m_2^{}\sim m_3^{}$, where $m_i$ is the $i$-th generation neutrino absolute mass. The relative sign assignments of neutrino masses in each type of mass hierarchies play the crucial roles for the stability against quantum corrections. Actually, two physical Majorana phases in the lepton flavor mixing matrix connect among the relative sign assignments of neutrino masses. Therefore, in this paper we analyze the stability of mixing angles against quantum corrections according to three types of neutrino mass hierarchies (Type A, B, C) and two Majorana phases. Two phases play the crucial roles for the stability of the mixing angles against the quantum corrections.

LaTeX2e, 15 pages, 8 figures

References in corpus (1)

• The effects of Majorana phases in three-generation neutrinos

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