Prog. Theor. Phys. Vol. 95 No. 1 (1996) pp. 115-141
A Separable Representation of the NN One-Boson-Exchange Potential and the Effect of the 1S0 Potential on the JP = 0^- πNN System near Pion Threshold
Faculty of Science, Ehime University, Matsuyama 790
(Received April 25, 1995)
A separable representation with respect ot the initial and final momentum variables is made for the NN one-boson-exchange potential (OBEP) due to Ueda, Riewe and Green in the method of Ernst, Shakin and Thaler. The representation is made for potentials with total angular momentum J ≤3 in the 0-300 MeV energy range of the incident laboratory proton. In rank two or three form, the OBEP is satisfactorily represented. The representation is very useful for problems of three-body systems involving two nucleons. An application is made to the JP = 0- πNN system in the three-body calculation. The effect of the separable 1S0 potential is investigated in the 3P0 NN →NN amplitude in this system. A remarkable threshold effect is found in the absorption parameter of the amplitude.
DOI : 10.1143/PTP.95.115
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