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Exclusive and kinematically complete high-statistics measurements of the basic double-pionic fusion reactions pn->dπ0π0, pn->dπ+π- and pp->dπ+π0 have been carried out simultaneously over the energy region of the ABC effect using the WASA detector setup at COSY. Whereas the isoscalar reaction part given by the dπ0π0 channel exhibits the ABC effect, i.e. a low-mass enhancement in the ππ-invariant...
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