  We show that black holes can posses a long range quantum mechanical hair
associated with a massive spin-2 field, which can be detected by a stringy
generalization of the Aharovon-Bohm effect, in which a string loop lassoes the
black hole. The long distance effect persist for arbitrarily high mass of the
spin-2 field. An analogous effect is exhibited by a massive antisymmetric
two-form field. We make a close parallel between the two and the ordinary
Aharonov-Bohm phenomenon, and also show that in the latter case the effect can
be experienced even by the electrically-neutral particles, provided some
boundary terms are added to the action.
