Are there non-strange low-lying penta-quarks and can we understand their width

R. W. Gothe, S. Nussinov

We argue that the lightest isospin 1/2 partners of the Z^+(1530) s(bar)uudd penta-quark predicted by Diakonov, Petrov and Polyakov are not the N(1710) mixed anti-decuplet states, b…