Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The antineutrino energy structure in reactor experiments   The recent observation of an energy structure in the reactor antineutrino
spectrum is reviewed. The reactor experiments Daya Bay, Double Chooz and RENO
have reported a consistent excess of antineutrinos deviating from the flux
predictions, with a local significance of about 4$\sigma$ between 4 and 6 MeV
of the positron energy spectrum. The possible causes of the structure are
analyzed in this work, along with the different experimental approaches
developed to identify its origin. Considering the available data and results
from the three experiments, the most likely explanation concerns the reactor
flux predictions and the associated uncertainties. Therefore, the different
current models are described and compared. The possible sources of
incompleteness or inaccuracy of such models are discussed, as well as the
experimental data required to improve their precision.

31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph