Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The electromagnetic form factors of the $\Lambda$ in the timelike region   The reaction $e^+e^- \to \bar \Lambda \Lambda$ is investigated for energies
close to the threshold. Specific emphasis is put on the role played by the
interaction in the final $\bar \Lambda \Lambda$ system which is taken into
account rigorously. For that interaction a variety of $\bar \Lambda \Lambda$
potential models is employed that have been constructed for the analysis of the
reaction $\bar p p \to \bar \Lambda \Lambda$ in the past. The enhancement of
the effective form factor for energies close to the $\bar \Lambda \Lambda$
threshold, seen in pertinent experiments, is reproduced. Predictions for the
$\Lambda$ electromagnetic form factors $G_M$ and $G_E$ in the timelike region
and for spin-dependent observables such as spin-correlation parameters are
presented.

4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin