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The minimal seesaw and leptogenesis models.
Rep Prog Phys
April 2021
Department of Physics, Liaoning Normal University, Dalian 116029, People's Republic of China.
Given its briefness and predictability, the minimal seesaw-a simplified version of the canonical seesaw mechanism with only two right-handed neutrino fields-has been studied in depth and from many perspectives, and now it is being pushed close to a position of directly facing experimental tests. This article is intended to provide an up-to-date review of various phenomenological aspects of the minimal seesaw and its associated leptogenesis mechanism in neutrino physics and cosmology. Our focus is on possible flavor structures of such benchmark seesaw and leptogenesis scenarios and confronting their predictions with current neutrino oscillation data and cosmological observations.
View Article and Find Full Text PDFA review of μ-τ flavor symmetry in neutrino physics.
Rep Prog Phys
July 2016
Institute of High Energy Physics and School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
Behind the observed pattern of lepton flavor mixing is a partial or approximate μ-τ flavor symmetry-a milestone on our road to the true origin of neutrino masses and flavor structures. In this review article we first describe the features of μ-τ permutation and reflection symmetries, and then explore their various consequences on model building and neutrino phenomenology. We pay particular attention to soft μ-τ symmetry breaking, which is crucial for our deeper understanding of the fine effects of flavor mixing and CP violation.
View Article and Find Full Text PDFRelation between the neutrino and quark mixing angles and grand unification.
Phys Rev Lett
October 2004
National Institute of Chemical Physics and Biophysics, Ravala 10, Tallinn 10143, Estonia.
We argue that there exists a simple relation between the quark and lepton mixings, which supports the idea of grand unification and probes the underlying robust bimaximal fermion mixing structure of still unknown flavor physics. In this framework the quark mixing matrix is a parameter matrix describing the deviation of neutrino mixing from exactly bimaximal, predicting theta(sol)+theta(C)=pi/4, where theta(C) is the Cabibbo angle, theta(atm)+theta(CKM)(23)=pi/4 and theta(MNS)(13) approximately theta(CKM)(13) approximately O(lambda(3)), in perfect agreement with experimental data. Both non-Abelian and Abelian flavor symmetries are needed for such a prediction to be realistic.
View Article and Find Full Text PDFFlavor-mixing structure functions in the Nambu-Jona-Lasinio model.
Phys Rev D Part Fields
March 1990
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