Three-Flavor Subleading Effects and Systematic Uncertainties in Super-Kamiokande

摘要

Subleading 3nu effects in atmospheric v oscillations(including those induced by nonzero deltam~2=m_2~2 - m_1~2 at any value of theta_(13))have been considered long ago,but only recently the Super-Kamiokande(SK)data have started to show some weak sensitivity to them,sparking an increasing theoretical and experimental interest.I discuss some selected(analytical,numerical,and statistical)topics related to such subleading effects,which might help their understanding in future atmospheric nu searches characterized by higher statistics and smaller systematics.