Super-Radiant States and Narrow Hadronic Resonances

Details Super-Radiant States and Narrow Hadronic Resonances Super-Radiant States and Narrow Hadronic Resonances

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..apr.d7001a&link_type=abstract

American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #D7.001

Physics

Nuclear Physics

Scientific paper

The recent experimental discovery of the exotic ``pentaquark" resonance Θ^+(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 γ/D≥ 1 of their bare widths to energy spacings can decay into k

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