Neutrino anomalies and quasi dirac neutrinos

Goswami, Srubabati ; Joshipura, Anjan S. (2002) Neutrino anomalies and quasi dirac neutrinos Physical Review D: Particles, Fields, Gravitation, and Cosmology, 65 (7). Article ID 073025. ISSN 2470-0010

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We discuss the possibility of describing solar, atmospheric and LSND results with four neutrinos forming two quasidegenerate pairs. The simplest versions of this 2+2 scheme with either νe or νμmixing exclusively with sterile neutrino are disfavored by the SNO and atmospheric neutrino results, respectively. A generalized scheme with sterile state participating in both the solar and atmospheric oscillations is still allowed. We show that the complex pattern of mixing needed for this purpose follows from a simple Le+Lμ−Lτ−Ls symmetry. The specific form of the Le+Lμ−Lτ−Lssymmetric mass matrix is determined from experimental results. Two theoretical schemes which lead to this form and a proper breaking of Le+Lμ−Lτ−Lssymmetry are discussed.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:108796
Deposited On:01 Feb 2018 04:47
Last Modified:01 Feb 2018 04:47

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