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Pionic decay of a possible d'-dibaryon and the short-range NN interaction | | I. T. Obukhovsky
; K. Itonaga
; Georg Wagner
; A. J. Buchmann
; Amand Faessler
; | | Date: |
29 Aug 1997 | | Journal: | Phys.Rev. C56 (1997) 3295-3306 | | Subject: | nucl-th astro-ph hep-ph | | Abstract: | We study the pionic decay of a possible dibaryon d’ --> N N pi in the microscopic quark shell model. The initial d’ dibaryon wave function (J^P=0^-, T=0) consists of one 1hbaromega six-quark shell-model s^5p[51]_X configuration. The most important final six-quark configurations s^6[6]_X, s^4p^2[42]_X and (s^4p^2-s^52s)[6]_X are properly projected onto the NN channel. The final state NN interaction is investigated by means of two phase-equivalent - but off-shell different - potential models. We demonstrate that the decay width Gamma_d’ depends strongly on the short-range behavior of the NN wave function. In addition, the width Gamma_d’ is very sensitive to the mass and size of the d’ dibaryon. For dibaryon masses slightly above the experimentally suggested value M_d’=2.065 GeV, we obtain a pionic decay width of Gamma_d’ = 0.18 - 0.32 MeV close to the experimental value Gamma_d’ = 0.5 MeV. | | Source: | arXiv, nucl-th/9708056 | | Services: | Forum | Review | PDF | Favorites | |
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