Pentaquarks. T (1540). B=1, S= 1 ? hypercharge Y=2. We find no Isospin-partners (T0T ) in experiments. T (1540) should be a member of 10*representation. Minimal quark contents is 5 quarks. Isospin of the pentaquark is I=0. I=0, Y=2. Spin and Parity remain undetermined!!. Has a very narrow width.
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