Aspects of arbitrarily oriented dipoles scattering in plane: short-range interaction influence

TL;DR

This study numerically investigates how short-range interactions and dipole orientations influence resonances and scattering properties in 2D anisotropic dipolar collisions across various energies.

Contribution

It reveals the dependence of 2D dipolar scattering resonances on short-range interaction radius and dipole tilt angles, introducing the concept of a critical tilt angle for resonance occurrence.

Findings

Resonances occur only when the tilt angle exceeds a critical value.

Cross sections depend strongly on the short-range interaction model and dipole orientations.

Energy dependencies of scattering cross sections differ from 3D cases, showing oscillations with tilt angle.

Abstract

The impact of the short-range interaction on the resonances occurrence in the anisotropic dipolar scattering in a plane was numerically investigated for the arbitrarily oriented dipoles and for a wide range of collision energies. We revealed the strong dependence of the cross section of the 2D dipolar scattering on the radius of short-range interaction, which is modeled by a hard wall potential and by the more realistic Lennard-Jones potential, and on the mutual orientations of the dipoles. We defined the critical (magic) tilt angle of one of the dipoles, depending on the direction of the second dipole for arbitrarily oriented dipoles. It was found that resonances arise only when this angle is exceeded. In contrast to the 3D case, the energy dependencies of the boson (fermion) 2D scattering cross section grows (is reduced) with an energy decrease in the absence of the resonances. We showed that the mutual orientation of dipoles strongly impacts the form of the energy dependencies, which begin to oscillate with the tilt angle increase, unlike the 3D dipolar scattering. The angular distributions of the differential cross section in the 2D dipolar scattering of both bosons and fermions are highly anisotropic at non-resonant points. The results of the accurate numerical calculations of the cross section agree well with the results obtained within the Born and eikonal approximations.