Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of baryon acoustic oscillations with SDSS DR12 data and
  measurement of $\Omega_\textrm{DE}(a)$   We define Baryon Acoustic Oscillation (BAO) distances $\hat{d}_\alpha(z,
z_c)$, $\hat{d}_z(z, z_c)$, and $\hat{d}_/(z, z_c)$ that do not depend on
cosmological parameters. These BAO distances are measured as a function of
redshift $z$ with the Sloan Digital Sky Survey (SDSS) data release DR12. From
these BAO distances alone, or together with the correlation angle
$\theta_\textrm{MC}$ of the Cosmic Microwave Background (CMB), we constrain the
cosmological parameters in several scenarios. We find $4.3 \sigma$ tension
between the BAO plus $\theta_\textrm{MC}$ data and a cosmology with flat space
and constant dark energy density $\Omega_\textrm{DE}(a)$. Releasing one and/or
the other of these constraints obtains agreement with the data. We measure
$\Omega_\textrm{DE}(a)$ as a function of $a$.

34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org