Analysis of a three flavor neutrino oscillation fit to recent Super-Kamiokande data

Citation
C. Meier et T. Ohlsson, Analysis of a three flavor neutrino oscillation fit to recent Super-Kamiokande data, EUR PHY J C, 18(1), 2000, pp. 97-106
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
18
Issue
1
Year of publication
2000
Pages
97 - 106
Database
ISI
SICI code
1434-6044(200012)18:1<97:AOATFN>2.0.ZU;2-I
Abstract
We have analyzed the most recent available Super-Kamiokande data in a three flavor neutrino oscillation model. We have here neglected possible matter effects and we performed a fit to atmospheric and solar Super-Kamiokande da ta. We have investigated a large parameter range where the mixing angles we re restricted to 0 less than or equal to theta (i) less than or equal to pi /2, i = 1,2,3, and the mass squared differences were taken to be in the in tervals 10(-11) eV(2) less than or equal to Deltam(2) less than or equal to 10(-2) eV(2) and 10(-4) eV(2) less than or equal to DeltaM(2) less than or equal to 10 eV(2), i.e., the hierarchy between the mass squared difference s is not completely determined. This yielded a best solution characterized by the parameter values theta (1) similar or equal to 45 degrees, theta (2) similar or equal to 10 degrees, theta (3) similar or equal to 45 degrees, Deltam(2) similar or equal to 4.4 x 10(-10) eV(2), and DeltaM(2) similar or equal to 1.01. x 10(-3) eV(2), which shows that the analyzed experimental data speak in favor of a bimaximal mixing scenario with one of the mass squ ared differences in the "just-so" domain and the other one in the range cap able of providing a solution to the atmospheric neutrino problem.