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We calculate decuplet contributions to the s-wave pseudoscalar mesonoctet-baryon scattering lengths to the third order in heavy baryon chiralperturbation theory (HB$\chi$PT). Using experimental pion-nucleon andkaon-nucleon scattering lengths as inputs, we determine low-energy constantsand predict other meson-baryon scattering lengths. Numerically we considerthree cases: (1) the case with only baryon octet contributions; (2) withdecuplet contributions and (3) in the large N_c limit. Hopefully, theanalytical expressions and the predictions are helpful to future investigationsof the meson-baryon scattering lengths.Comment: 11 pages, 1 figure, 9 table

Decuplet contribution to the meson–baryon scattering lengths