Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interactions of multiple spin-2 fields beyond pairwise couplings   Thus far, all known ghost-free interactions of multiple spin-2 fields have
involved at most pairwise couplings of the fields, which are direct
generalizations of bimetric interactions. Here we present a class of spin-2
theories with genuine multi-field interactions, and explicitly demonstrate the
absence of ghost instabilities. The construction involves integrating out a
nondynamical field in a theory of spin-2 fields with only pairwise ghost-free
interactions. The new multi-vierbein interactions generated are not always
expressible in terms of the associated metrics.

30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph