Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hints of dynamical vacuum energy in the expanding Universe   Recently there have been claims on model-independent evidence of dynamical
dark energy. Herein we consider a fairly general class of cosmological models
with a time-evolving cosmological term of the form $\Lambda(H)=C_0+C_H
H^2+C_{\dot{H}} \dot{H}$, where $H$ is the Hubble rate. These models are well
motivated from the theoretical point of view since they can be related to the
general form of the effective action of quantum field theory in curved
spacetime. Consistency with matter conservation can be achieved by letting the
Newtonian coupling $G$ change very slowly with the expansion. We solve these
dynamical vacuum models and fit them to the wealth of expansion history and
linear structure formation data. The results of our analysis show a
significantly better agreement as compared to the concordance $\Lambda$CDM
model, thus supporting the possibility of a dynamical cosmic vacuum.

9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics