Chiral unitary approach to the K−–deuteron scattering length

✍ Scribed by S.S. Kamalov; E. Oset; A. Ramos

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 152 KB
• Volume: 690
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)00709-0

✦ Synopsis

Starting from a recent model where the KN 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 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.