Domain walls zoo in supersymmetric QCD

Solving numerically the equations of motion for the effective Lagrangian describing supersymmetric QCD with the SU(2) gauge group, we find a menagerie of complex domain wall solutions connecting different chirally asymmetric vacua. Some of these solutions are BPS-saturated walls; they exist when the mass of the matter fields does not exceed some critical value m < m(*) = 4.67059... There are also sphaleron branches (saddle points of the energy functional). In the range m(*) < m < m(**) approximate to 4.83, one of these branches becomes a local minimum (which is not a BPS-saturated one). At m > m(**), the complex walls disappear altogether and only the walls connecting a chirally asymmetric vacuum with the chirally symmetric one survive. (C) 1998 Elsevier Science B.V.