Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral Unitary Dynamics of Hadrons and Hadrons in a Nuclear Medium   In this talk I summarize recent findings around the description of axial
vector mesons as dynamically generated states from the interaction of
pseudoscalar mesons and vector mesons, dedicating some attention to the two
$K_1(1270)$ states. Then I review the generation of open and hidden charm
scalar and axial states, and how some recent experiment supports the existence
of the new hidden charm scalar state predicted. I present recent results
showing that the low lying $1/2^+$ baryon resonances for S=-1 can be obtained
as bound states or resonances of two mesons and one baryon in coupled channels.
Then show the differences with the S=0 case, where the $N^*(1710)$ appears also
dynamically generated from the two pion one nucleon system, but the $N^*(1440)$
does not appear, indicating a more complex structure of the Roper resonance.
Finally I shall show how the state X(2175), recently discovered at BABAR and
BES, appears naturally as a resonance of the $\phi K \bar{K}$ system.

5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga