Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On transition of non-stationary waves   The probability of the events that the final states are detected with or
interact with the nucleus in a finite time interval T was found to be, $P=\text
T \Gamma_0 +P^{(d)}$. $\Gamma_0$ is computed with Fermi's golden rule, and does
not depend on the nuclear wave functions. $P^{(d)}$ is not given by Fermi's
golden rule, and depends on the nuclear wave functions. In the electron mode of
pion decays, $\Gamma_0$ is proportional to $m_e^2$ but $P^{(d)}$ for the event
that the neutrino is detected is proportional to $m_{\nu}^{-2}$. $P^{(d)}$ does
not hold the helicity suppression satisfied in $\Gamma_0$ and is inevitable in
non-stationary quantum phenomena.

33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn