  But if you treat it as a two-form, you get three nontrivial renormalization
group fixed points! Which becomes the Heisenberg fixed point in three
dimensions? Motivated by this question, we study the conformal bootstrap
constraint in the $O(d)$ anti-symmetric matrix model in $d$ dimensions, varying
$d$ as a continuous parameter. Besides the one that is naturally connected to
the Heisenberg fixed point in three dimensions, we find "evanescent" kinks
whose origin is yet to be identified. We also bootstrap $O(4), O(5), O(6)$
anti-symmetric matrix model in $d=3$, aiming at physical applications.
