Regular Article - Theoretical Physics
Decuplet contribution to the meson–baryon scattering lengths
Department of Physics, Peking University, Beijing, 100871, P.R. China
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Published online: 26 July 2007
We calculate decuplet contributions to the s-wave pseudoscalar meson octet–baryon scattering lengths to the third order in heavy baryon chiral perturbation theory (HBχPT). Using experimental pion–nucleon and kaon–nucleon scattering lengths as inputs, we determine low-energy constants and predict other meson–baryon scattering lengths. Numerically we consider three cases: (1) the case with only baryon octet contributions; (2) with decuplet contributions and (3) in the large Nc limit. Hopefully, the analytical expressions and the predictions are helpful to future investigations of the meson–baryon scattering lengths.
© Springer-Verlag , 2007