Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on cosmological birefringence from Planck and Bicep2/Keck
  data   The polarization of cosmic microwave background (CMB) can be used to
constrain cosmological birefringence, the rotation of the linear polarization
of CMB photons potentially induced by parity violating physics beyond the
standard model. This effect produces non-null CMB cross correlations between
temperature and B mode-polarization, and between E- and B-mode polarization.
Both cross-correlations are otherwise null in the standard cosmological model.
We use the recently released 2015 Planck likelihood in combination with the
Bicep2/Keck/Planck (BKP) likelihood to constrain the birefringence angle
$\alpha$. Our findings, that are compatible with no detection, read $\alpha =
0.0^{\circ} \pm 1.3^{\circ} \mbox{ (stat)} \pm 1^{\circ} \mbox{ (sys)} $ for
{\sc Planck} data and $\alpha = 0.30^{\circ} \pm 0.27^{\circ} \mbox{ (stat)}
\pm 1^{\circ} \mbox{(sys)} $ for BKP data. We finally forecast the expected
improvements over present constraints when the Planck BB, TB and EB spectra at
high $\ell$ will be included in the analysis.

7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga