Majorana neutrino masses and neutrino oscillations

Sin Kyu Kang; C. S. Kim

doi:10.1103/physrevd.63.113010

Neutrino oscillations with large oscillation length in spite of large (Majorana) neutrino masses?

Lettere al Nuovo Cimento ◽

10.1007/bf02751821 ◽

1983 ◽

Vol 37 (13) ◽

pp. 467-471 ◽

Cited By ~ 8

Author(s):

S. M. Bilenky ◽

B. Pontecorvo

Keyword(s):

Neutrino Oscillations ◽

Majorana Neutrino ◽

Neutrino Masses ◽

Large Oscillation ◽

Oscillation Length

Download Full-text

PATTERN OF THE APPROXIMATE MASS DEGENERACY OF MAJORANA NEUTRINOS

Modern Physics Letters A ◽

10.1142/s0217732302006412 ◽

2002 ◽

Vol 17 (05) ◽

pp. 289-294 ◽

Cited By ~ 28

Author(s):

ERNEST MA

Keyword(s):

Symmetry Breaking ◽

Solar Neutrino ◽

Neutrino Oscillations ◽

Majorana Neutrino ◽

Electron Neutrino ◽

Neutrino Masses ◽

Interesting Possibility ◽

Majorana Neutrinos ◽

Mass Degeneracy ◽

Natural Pattern

In view of the recently reported evidence for a nonzero Majorana mass of the electron neutrino, together with the established phenomena of atmospheric and solar neutrino oscillations, the case of three nearly mass-degenerate Majorana neutrinos is now an interesting possibility. We show in this paper how a natural pattern of symmetry breaking in the recently proposed A4 model of Majorana neutrino masses can accommodate the data on neutrino oscillations, resulting in the predictions sin 2 2θ atm = 1 and sin 2 2θ sol = 2/3.

Download Full-text

Structure of flavor changing Goldstone boson interactions

Journal of High Energy Physics ◽

10.1007/jhep04(2021)141 ◽

2021 ◽

Vol 2021 (4) ◽

Author(s):

Jin Sun ◽

Yu Cheng ◽

Xiao-Gang He

Keyword(s):

Symmetry Breaking ◽

Model Building ◽

Neutral Current ◽

Goldstone Boson ◽

New Physics ◽

Majorana Neutrino ◽

Neutrino Masses ◽

Type I ◽

Flavor Changing ◽

Flavor Changing Neutral Current

Abstract General flavor changing Goldstone boson (GB) interactions with fermions from a spontaneous global U(1)G symmetry breaking are discussed. This GB may be the Axion, solving the strong QCD CP problem, if there is a QCD anomaly for the assignments of quarks U(1)G charge. Or it may be the Majoron, producing seesaw Majorana neutrino masses by lepton number violation, if the symmetry breaking scale is much higher than the electroweak scale. It may also, in principle, play the roles of Axion and Majoron simultaneously as far as providing solution for the strong CP problem and generating a small Majorana neutrino masses are concerned. Great attentions have been focused on flavor conserving GB interactions. Recently flavor changing Axion and Majoron models have been studied in the hope to find new physics from rare decays in the intensity frontier. In this work, we will provide a systematic model building aspect study for flavor changing neutral current (FCNC) GB interactions in the fermion sectors, or separately in the quark, charged lepton and neutrino sectors and will identify in detail the sources of FCNC interactions in a class of beyond standard model with a spontaneous global U(1)G symmetry breaking. We also provide a general proof of the equivalence of using physical GB components and GB broken generators for calculating GB couplings to two gluons and two photons, and discuss some issues related to spontaneous CP violation models. Besides, we will also provide some details for obtaining FCNC GB interactions in several popular models, such as the Type-I, -II, -III seesaw and Left-Right symmetric models, and point out some special features in these models.

Download Full-text