content_image/334966.jpg
<img src='content_image/334966.jpg'>

the p -wave barrier height will be different for m$_{L}$ = 0 and m$_{L}$ = ± 1 scattering, where m$_{L}$ is the projection of the relative orbital angular momentum L onto the electric-field direction. In particular, the attractive nature of dipole-dipole interaction for polar molecules colliding “head-to-tail” lowers the barrier for m$_{L}$ = 0 collisions, while the repulsive dipole- dipole interaction for polar molecules colliding “side-by-side” raises the barrier for m$_{L}$ = ± 1 collisions. Fig. 2 A,B show these effects schematically, while Fig. 2 C shows the calculated maximum height of the m$_{L}$ = 0 and m$_{L}$ = ± 1 collisional barriers, V$_{0}$ and V$_{1}$ , respectively, as a function of d . 

