Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Current and future supernova constraints on decaying $\Lambda$
  cosmologies   We investigate observational constraints from present and future supernova
data on a large class of decaying vacuum cosmologies. In such scenarios the
present value of the vacuum energy density is quantified by a positive $\beta$
parameter smaller than unity. By assuming a Gaussian prior on the matter
density parameter ($\Omega_{\rm{m}} = 0.35 \pm 0.07$) we find $\Omega_{\rm{m}}
= 0.34^{+0.14}_{-0.12}$ and $\beta = 0.62^{+0.12}_{-0.24}$ (95% c.l.) as the
best fit values for the present data. We show that, while the current data
cannot provide restrictive constraints on the $\Omega_{\rm{m}} - \beta$ plane,
the future SNe data will limit considerably the allowed space of parameter. A
brief discussion about the equivalence between dynamical-$\Lambda$ scenarios
and scalar field cosmologies is also included.

22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph