Sigma(plus) - Proton :

A1 =  -4.3    Fm              R1 = 3.18 Fm

A3 = (-0.29, -0.14) Fm  R3 = (-60,-17) Fm

  Model NSC97

---------------------------------

A1 = (-6.4,-4.8) Fm  ;   A3 = (-4.3,-2.7) Fm

  QCD sum rules

Sigma(minus) - Proton :

A1 = -2.1 Fm     A3 = -1.1 Fm

  QCD sum rules

Sigma(minus) - Neutron :

A1 =  (-6.2,-5.9)     Fm   R1 = 3.3 Fm

A3 =  (-0.33,-0.18) Fm   R3 = (-11,-40) Fm

   Model NSC97