Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hypernuclei and in-medium chiral dynamics   A recently introduced relativistic nuclear energy density functional,
constrained by features of low-energy QCD, is extended to describe the
structure of hypernuclei. The density-dependent mean field and the spin-orbit
potential of a $\Lambda$-hyperon in a nucleus, are consistently calculated
using the SU(3) extension of in-medium chiral perturbation theory. The leading
long-range $\Lambda N$ interaction arises from kaon-exchange and
$2\pi$-exchange with a $\Sigma$-hyperon in the intermediate state. Scalar and
vector mean fields, originating from in-medium changes of the quark
condensates, produce a sizeable {\em short-range} spin-orbit interaction. The
model, when applied to oxygen as a test case, provides a natural explanation
for the smallness of the effective $\Lambda$ spin-orbit potential: an almost
complete cancellation between the background contributions (scalar and vector)
and the long-range terms generated by two-pion exchange.

23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga