Long Range Forces from Two Neutrino Exchange Revisited

Abstract

The exchange of two massless neutrinos gives rise to a long range force which couples to weakly charged matter. As has been noted previously in the literature, the potential for this force is $\VN \propto G_{F}^2 / r^5$ with monopole-monople, spin-spin and more complicated interactions. Unfortunately, this is far too small to be observed in present day experiments. We calculate $\VN$ explicitly in the electroweak theory, and show that under very general assumptions forces arising from the exchange of two massless fermions can at best yield $1/r^5$ potentials.

5 pages + 1 figure (not included), UFIFT-HEP-92-28/HUTP-92-A041

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