Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collisions in a dual-species magneto-optical trap of molecules and atoms   We study inelastic collisions between CaF molecules and $^{87}$Rb atoms in a
dual-species magneto-optical trap. The presence of atoms increases the loss
rate of molecules from the trap. By measuring the loss rates and density
distributions, we determine a collisional loss rate coefficient $k_{2} = (1.43
\pm 0.29) \times 10^{-10}$ cm$^{3}$/s at a temperature of 2.4 mK. We show that
this is not substantially changed by light-induced collisions or by varying the
populations of excited-state atoms and molecules. The observed loss rate is
close to the universal rate expected in the presence of fast loss at short
range, and can be explained by rotation-changing collisions in the ground
electronic state.

37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex