J. Clua et Ja. Grifols, BOUND-STATES OF SCALAR BOSONS IN EXTENSIONS OF THE STANDARD MODEL, Zeitschrift fur Physik. C, Particles and fields, 72(4), 1996, pp. 677-687
We explore systematically, in a general two Higgs doublet model, the p
ossibility that bound systems of scalar bosons do exist. We find a wid
e region of parameter space in the scalar potential for which S-wave b
ound states of Higgs bosons do indeed exist. On the contrary we show t
hat the Minimal Supersymmetric Standard Model does not admit such boun
d systems.