Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for hidden-photon cold dark matter using a K-band cryogenic
  receiver   We search for hidden-photon cold dark matter (HP-CDM) using a spectroscopic
system in a K-band frequency range. Our system comprises a planar metal plate
and cryogenic receiver. This is the first time a cryogenic receiver has been
used in the search for HP-CDM. Such use helps reduce thermal noise. We recorded
data for 9.3 hours using an effective aperture area of 14.8 cm$^2$. No signal
was found in the data. We set upper limits for the parameter of mixing between
the photon and HP-CDM in the mass range from 115.79 to 115.85 $\mu$eV, $\chi <
1.8$-$4.3 \times 10^{-10}$, at a 95% confidence level. This is the most
stringent upper limit obtained to date in the considered mass range.

36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph