Global three-neutrino oscillation analysis of neutrino data - art. no. 033005

A global analysis of the solar, atmospheric and reactor neutrino data is pr esented in terms of three-neutrino oscillations. We include the most recent solar neutrino rates of Homestake, SAGE, GALLEX and GNO. as well as the re cent 1117 day Super-Kamiokande data sample, including the recoil electron e nergy spectrum both for day and night periods, and we treat in a unified wa y the full parameter space for oscillations, correctly accounting for the t ransition from the matter enhanced to the vacuum oscillations regime. Likew ise, we include in our description conversions with theta (12) > pi /4 For the atmospheric data we perform our analysis of the contained events and th e upward-going v-induced muon fluxes, including the previous data samples o f Frejus, IMB, Nusex. and Kamioka experiments as well as the full 71 kton y r (1144 days) Super-Kamiokande data set, the recent 5.1 kton yr contained e vents of Soudan2 and the results on upgoing muons from the MACRO detector. We first present the allowed regions of solar and atmospheric oscillation p arameters theta (12). Deltam(21)(2) and theta (23), Deltam(32)(2). respecti vely, as a function of theta (13). We determine the constraints from atmosp heric and solar data on the mixing angle theta (13). common to solar and at mospheric analyses. The solar limit on theta (13), although relatively weak . is totally independent on the allowed range of the atmospheric mass diffe rence hm:,. On the other hand, the atmospheric data analysis indicates an i mportant complementarity with the reactor limits allowing for a stronger co nstraint on the allowed value of theta (13) We also obtain the allowed rang es of parameters from the full five-dimensional combined analysis of the so lar, atmospheric and reactor data.