Three generation neutrino oscillation parameters after SNO

Bandyopadhyay, Abhijit ; Choubey, Sandhya ; Goswami, Srubabati ; Kar, Kamales (2002) Three generation neutrino oscillation parameters after SNO Physical Review D: Particles, Fields, Gravitation, and Cosmology, 65 (7). Article ID 073031. ISSN 2470-0010

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We examine the solar neutrino problem in the context of the realistic three neutrino mixing scenario including the SNO charged current (CC) rate. The two independent mass squared differences Δm221 and Δm231 ≈ Δm232 are taken to be in the solar and atmospheric ranges, respectively. We incorporate the constraints on Δm231 as obtained by the Super Kamiokande atmospheric neutrino data and determine the allowed values of Δm221, θ12 and θ13 from a combined analysis of solar and CHOOZ data. Our aim is to probe the changes in the values of the mass and mixing parameters with the inclusion of the SNO data as well as the changes in the two-generation parameter region obtained from the solar neutrino analysis with the inclusion of the third generation. We find that the inclusion of the SNO CC rate in the combined solar + CHOOZ analysis puts a more restrictive bound on θ13. Since the allowed values of θ13 are constrained to very small values by the CHOOZ experiment there is no qualitative change over the two generation allowed regions in the Δm221 −tan2θ12 plane. The best fit comes in the LMA region and no allowed area is obtained in the SMA region at the 3σ level from combined solar and CHOOZ analysis.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:108866
Deposited On:01 Feb 2018 04:48
Last Modified:01 Feb 2018 04:48

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