Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Double Chooz: Latest results   The latest results from the Double Chooz experiment on the neutrino mixing
angle $\theta_{13}$ are presented. A detector located at an average distance of
1050 m from the two reactor cores of the Chooz nuclear power plant has
accumulated a live time of 467.90 days, corresponding to an exposure of 66.5
GW-ton-year (reactor power $\times$ detector mass $\times$ live time). A
revised analysis has boosted the signal efficiency and reduced the backgrounds
and systematic uncertainties compared to previous publications, paving the way
for the two detector phase. The measured $\sin^2 2\theta_{13} =
0.090^{+0.032}_{-0.029}$ is extracted from a fit to the energy spectrum. A
deviation from the prediction above a visible energy of 4 MeV is found, being
consistent with an unaccounted reactor flux effect, which does not affect the
$\theta_{13}$ result. A consistent value of $\theta_{13}$ is measured in a
rate-only fit to the number of observed candidates as a function of the reactor
power, confirming the robustness of the result.

10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn