Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: In-Medium Spectral Functions of Vector- and Axial-Vector Mesons from the
  Functional Renormalization Group   In this work we present first results on vector and axial-vector meson
spectral functions as obtained by applying the non-perturbative functional
renormalization group approach to an effective low-energy theory motivated by
the gauged linear sigma model. By using a recently proposed analytic
continuation method, we study the in-medium behavior of the spectral functions
of the $\rho$ and $a_1$ mesons in different regimes of the phase diagram. In
particular, we demonstrate explicitly how these spectral functions degenerate
at high temperatures as well as at large chemical potentials, as a consequence
of the restoration of chiral symmetry. In addition, we also compute the
momentum dependence of the $\rho$ and $a_1$ spectral functions and discuss the
various time-like and space-like processes that can occur.

31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat