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

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

2003-08-22

arxiv.org/abs/hep-ph/0308230v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 1 figure

Scientific paper

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, but the pure non-strange u(bar)(ud)(ud) and d(bar)(ud)(ud) penta-quark states which may lie as low as 1200 MeV. The expected low width of a few MeV of such a putative state may explain why it was missed in phase shift analyzes of pion-nucleon scattering.

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