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Chiral unitary approach to the K--deuteron scattering length

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Chiral unitary approach to the K--deuteron scattering length

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Kamalov, Sabit S.; Oset Báguena, Eulogio; Ramos Gómez, Àngels

Aquest document és un/a article, creat/da en: 2001

Starting from a recent model where the (K) over barN amplitudes are evaluated from the chiral Lagrangians using a coupled-channel unitary method, we evaluate here the scattering length for K--deuteron scattering. We find that the double scattering contribution is very large compared to the impulse approximation and that the charge-exchange contribution of this rescattering is as large as the sequential K scattering on the two nucleons. Higher-order rescattering corrections are evaluated using coupled channels with K- and (K) over bar (0) within the integral form of the fixed centre approximation to the Faddeev equations. The higher-order corrections involving intermediate pions and hyperons are found negligible. (C) 2001 Elsevier Science B.V. All rights reserved.

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