As far as I can tell, there are 6 parameters that describe how a neutrino oscillates: 2 mass squared differences, 3 mixing angles and another parameter I don't understand at all (delta). Thus I have three questions:
1) I understand that the 2 mass differences is enough information for the three masses, but we cant yet measure the actual mass. Is this limit due to current technology or is the mass squared difference the most fundamental information about the mass we could possibly acquire?
2) What exactly do the mixing angles physically represent? Are they all of the same importance, and if so why has the theta-13 angle been studied so relatively little? I have also read that a non-zero theta-13 angle hints towards an asymmetry between matter and anti-matter. How so, and why the 13 angle in particular over the other angles?
3) What is the delta parameter? I know that current technology does not have the capacity to measure it, but the next generation (hopefully) will. What does this parameter represent and what implications would measuring it have?