Three-body calculation of the Delta-Delta dibaryon candidate D(03) at 2.37 GeV

Abstract

The D(03) dibaryon is generated dynamically as a resonance pole in a pion-nucleon-Delta' three-body model, where Delta' is a stable Delta baryon. Using separable interactions dominated by the Delta(1232) isobar for pion-nucleon and by the D(12) isobar for nucleon-Delta', where D(12) is the nucleon-Delta 2150 MeV dibaryon deduced in and constrained by 1D2 pp scattering, the model reduces to an effective two-body problem for Delta-Delta' which is solved. The mass and width of D(03) are found close to those of the I(JP)=0(3+) resonance peak observed by WASA@COSY in pion-production pn collisions at 2.37 GeV.

arXiv commentv3 -- 5 pages, 3 figures, 3 tables, matching PRL published version (online before Oct.25 2013)

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