Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum-state resolved bimolecular collisions of velocity-controlled OH
  with NO radicals   Whereas atom-molecule collisions have been studied with complete quantum
state resolution, interactions between two state-selected molecules have proven
much harder to probe. Here, we report the measurement of state-resolved
inelastic scattering cross sections for collisions between two open-shell
molecules that are both prepared in a single quantum state. Stark-decelerated
OH radicals were scattered with hexapole-focused NO radicals in a crossed beam
configuration. Rotationally and spin-orbit inelastic scattering cross sections
were measured on an absolute scale for collision energies between 70 and 300
cm$^{-1}$. These cross sections show fair agreement with quantum
coupled-channels calculations using a set of coupled model potential energy
surfaces based on ab initio calculations for the long-range non-adiabatic
interactions and a simplistic short-range interaction. This comparison reveals
the crucial role of electrostatic forces in complex molecular collision
processes.

6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph