Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Backgrounds and sensitivity of the NEXT double beta decay experiment   NEXT (Neutrino Experiment with a Xenon TPC) is a neutrinoless double-beta
(\beta \beta 0\nu) decay experiment that will operate at the Canfranc
Underground Laboratory (LSC). It is an electroluminescent high-pressure gaseous
xenon Time Projection Chamber (TPC) with separate read-out planes for
calorimetry and tracking. Energy resolution and background suppression are the
two key features of any neutrinoless double beta decay experiment. NEXT has
both good energy resolution (<1% FWHM) at the Q value of $^{136} $Xe and an
extra handle for background identification provided by track reconstruction.
  With the background model of NEXT, based on the detector simulation and the
evaluation of the detector radiopurity, we can determine the sensitivity to a
measurement of the \beta\beta 2\nu\ mode in NEW and to a \beta\beta 0\nu\
search in NEXT100. In this way we can predict the background rate of $
5\times10^{-4}\ $counts/(keV kg yr), and a sensitivity to the Majorana neutrino
mass down to 100 meV after a 5-years run of NEXT100.

31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th