We review the present status of global analyses of neutrino oscillations , taking into account the most recent neutrino data including the latest KamLAND and K2K updates presented at Neutrino2004 , as well as state-of-the-art solar and atmospheric neutrino flux calculations .
We give the two-neutrino solar + KamLAND results , and the two-neutrino atmospheric + K2K oscillation regions , discussing in each case the robustness of the oscillation interpretation against departures from the Standard Solar Model and the possible existence of non-standard neutrino physics .
Furthermore , we give the best fit values and allowed ranges of the three–flavour oscillation parameters from the current worlds ’ global neutrino data sample and discuss in detail the status of the small parameters \alpha \equiv \Delta m ^ { 2 } _ { \textsc { sol } } / \Delta m ^ { 2 } _ { \textsc { atm } } as well as \sin ^ { 2 } \theta _ { 13 } , which characterize the strength of CP violating effects in neutrino oscillations .
We also update the degree of rejection of four–neutrino interpretations of the LSND evidence in view of the most recent developments .