Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Experimental Confirmation of the Corrections to the Fermi's golden
  rule   Standards calculations by the Fermi's Golden rule involve approximations.
These approximations could lead to deviations from the predictions of the
standard model as discussed in another paper. In this paper we propose
experimental searches for such deviations in the two photon spectra from the
decay of the neutral pion in the process $\phi \rightarrow \pi^{+} \pi^{-}
\pi^{0}$ and in the annihilation of the positron from nclear $\beta$ decay.

23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
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
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph