Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ADM Energy and Infra-gravitons   In QED and QCD [1, 2], infrared photons and gluons alter the Hilbert space of
the theory so that the in and out states live in a Hilbert space carrying a
representation of basic commutation relations which is non-equivalent to the
standard Fock representation, leading to spontaneous breakdown of Lorentz
symmetry and physical effects. These results are generalized here to quantum
gravity regarded as an SL(2; C) gauge theory and the shift of the ADM energy
density and mass from infrared spin connection (the spin cloud) is discussed.

31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat