Session D7 - Hadron Physics.
ORAL session, Saturday afternoon, May 01
Governor's Square 16, Adam's Mark Hotel
The recent experimental discovery of the exotic
``pentaquark" resonance \Theta^+(1540) with strangeness
S=+1 and very narrow width (earlier predicted in the
topological soliton model) triggered an avalanche of
alternative explanations in terms of special features of
quark structure, isospin selection rules, quasimolecular
kaon-nucleon correlation etc. Here we suggest that the
narrow width can result from a generic mechanism of the
redistribution of the widths of overlapping resonances due
to their coupling through few common decay channels. The
underlying universal dynamics appear when N unstable
intrinsic states with identical quantum numbers and ratio
\gamma/D\geq 1 of their bare widths to energy spacings can
decay into k Part D of program listing