Abstract
In certain mild extensions of the standard model, spin-independent long range forces can arise by exchange of two very light pseudoscalar spin-0 bosons. In particular, we have in mind models in which these bosons do not have direct tree level couplings to ordinary fermions. Using the dispersion theoretical method, we find a 1/r3 behavior of the potential for the exchange of very light pseudoscalars and a 1/r7 dependence if the pseudoscalars are true massless Goldstone bosons.
| Original language | English |
|---|---|
| Article number | 075009 |
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Physical Review D |
| Volume | 59 |
| Issue number | 7 |
| DOIs | |
| State | Published - Apr 1 1999 |