Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New insights into antikaon-nucleon scattering and the structure of the
  Lambda(1405)   We perform a combined analysis of antikaon-nucleon scattering cross sections
and the recent SIDDHARTA kaonic hydrogen data in the framework of a
coupled-channel Bethe-Salpeter approach at next-to-leading order in the chiral
expansion of the effective potential. We find a precise description of the
antikaon-proton scattering amplitudes and are able to extract accurate values
of the scattering lengths, a0=-1.81^+0.30_-0.28 + i 0.92^+0.29_-0.23 fm,
a1=+0.48^+0.12_-0.11 + i 0.87^+0.26_-0.20 fm. We also discuss the two-pole
structure of the Lambda(1405).

28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat