Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constructing the covariant three-point vertices systematically   An algorithm is developed for efficiently constructing the Lorentz covariant
effective three-point vertices of the decay of a particle into two daughter
particles in which all the masses and spins of the three particles can be
arbitrary. The closely-related one-to-one correspondence between the helicity
formalism and the covariant formulation is exploited for counting the number of
independent terms and identifying the basic covariant three-point vertices.
Assembling the basic operators according to the developed algorithm enables us
to construct all the covariant three-point vertices systematically.

22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin