Higgs- and Goldstone-boson-mediated long range forces - art. no. 075009

In certain mild extensions of the standard model, spin-independent long ran ge forces can arise by exchange of two very light pseudoscalar spin-0 boson s. In particular, we have in mind models in which these bosons do not have direct tree level couplings to ordinary fermions. Using the dispersion theo retical method, we find a 1/r(3) behavior of the potential for the exchange of very light pseudoscalars and a 1/r(7) dependence if the pseudoscalars a re true massless Goldstone bosons. [S0556-28s21(99)00509-3].