Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of initial spatial phase in radiative neutrino pair emission   We study radiative neutrino pair emission in deexcitation process of atoms
taking into account coherence effect in a macroscopic target system. In the
course of preparing the coherent initial state to enhance the rate, a spatial
phase factor is imprinted in the macroscopic target. It is shown that this
initial spatial phase changes the kinematics of the radiative neutrino pair
emission. We investigate effects of the initial spatial phase in the photon
spectrum of the process. It turns out that the initial spatial phase provides
us significant improvements in exploring neutrino physics such as the
Dirac-Majorana distinction and the cosmic neutrino background.

25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int