Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relative locality: A deepening of the relativity principle   We describe a recently introduced principle of relative locality which we
propose governs a regime of quantum gravitational phenomena accessible to
experimental investigation. This regime comprises phenomena in which $\hbar$
and $G_N$ may be neglected, while their ratio, the Planck mass $M_p
=\sqrt{\hbar / G_N}$, is important. We propose that $M_p$ governs the scale at
which momentum space may have a curved geometry. We find that there are
striking consequences for the concept of locality. The description of events in
spacetime now depends on the energy used to probe it. But there remains an
invariant description of physics in phase space. There is furthermore a
reasonable expectation that the geometry of momentum space can be measured
experimentally using astrophysical observations.

17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin