▁system ▁of ▁near ▁detect ors ▁located ▁ 2 8 0 ▁m ▁from ▁the ▁beam ▁production ▁place ▁at ▁the ▁J - PAR C ▁site , ▁and ▁then ▁again ▁in ▁the ▁Super - K ami ok ande ▁det ector . ▁Com parison ▁of ▁the ▁content ▁of ▁different ▁neut r ino ▁flav ours ▁in ▁these ▁two ▁locations ▁allows ▁measurement ▁of ▁the ▁oscill ations ▁probability ▁on ▁the ▁way ▁between ▁near ▁and ▁far ▁detect ors . ▁Super - K ami ok ande ▁is ▁able ▁to ▁detect ▁interactions ▁of ▁both , ▁mu on ▁and ▁electron ▁neut r inos , ▁and ▁thus ▁measure ▁the ▁disapp earance ▁of ▁mu on ▁neut r ino ▁flux , ▁as ▁well ▁as ▁electron ▁neut r ino ▁appearance ▁in ▁the ▁beam . ▁ ▁Physics ▁program ▁ ▁T 2 K ▁experiment ▁was ▁ ▁proposed ▁in ▁ 2 0 0 3 ▁with ▁the ▁following ▁measurement ▁goals : ▁ ▁The ▁discovery ▁of ▁the ▁ ▁→ ▁ ▁oscill ations , ▁and ▁thus ▁the ▁confirm ation ▁that ▁the ▁last ▁unknown ▁mixing ▁angle ▁ θ 1 3 ▁is ▁not ▁zero . ▁ ▁P rec ise ▁measurement ▁of ▁the ▁oscill ation ▁parameters ▁ Δ m ▁and ▁ θ 2 3 ▁via ▁mu on ▁neut r ino ▁disapp earance ▁studies . ▁ ▁Search ▁for ▁ster ile ▁neut r ino ▁oscill ations , ▁which ▁could ▁be ▁observed ▁as ▁a ▁def ic it ▁of ▁ ▁neutral ▁current ▁neut r ino ▁interactions . ▁ ▁Me asure ments ▁of ▁various ▁interaction ▁cross - sections ▁for ▁different ▁types ▁of ▁neut r inos ▁and ▁targets ▁in ▁an ▁energy ▁range ▁of