Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tensor amplitudes for partial wave analysis of $\psi
  \to\Delta\bar{\Delta}$ within helicity frame   We have derived the tensor amplitudes for partial wave analysis of
$\psi\to\Delta\bar{\Delta}$, $\Delta \to p \pi$ within the helicity frame, as
well as the amplitudes for the other decay sequences with same final states.
These formulae are practical for the experiments measuring $\psi$ decaying into
$p \bar{p}\pi^+ \pi^-$ final states, such as BESIII with its recently collected
huge $J/\psi$ and $\psi(2S)$ data samples.

16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin