Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quartet unconstrained formulation for massive higher spin fields   We generalize the unconstrained description of free massless higher spin
fields previously developed in [Nucl.Phys. B 779 (2007) 155] to the case of
free massive higher spin fields in a flat space of arbitrary dimension. The
Lagrangian is given in an easy-to-handle form for an arbitrary value of spin.
It is local, free from higher derivative terms, and involves a minimal number
of auxiliary fields needed for an unconstrained gauge invariant description of
a free massive higher spin field in arbitrary dimension.

23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol