Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutron-antineutron transition as a test-bed for dynamical CPT
  violations   We show a simple mechanism for a dynamical CPT violation in the neutron
sector. In particular, we show a {\it CPT-violating see-saw mechanism},
generating a Majorana mass and a CPT violating mass for the neutron.
CPT-violating see-saw involves a sterile partner of the neutron, living in a
hidden sector, in which CPT is spontaneously broken. In particular, neutrons
(antineutrons) can communicate with the hidden sector through non-perturbative
quantum gravity effects called {\it exotic instantons}. Exotic instantons
dynamically break R-parity, generating one effective vertex between the neutron
and its sterile partner. In this way, we show how a small CPT violating mass
term for the neutron is naturally generated. This model can be tested in the
next generation of experiments in neutron-antineutron physics. This strongly
motivates researches of CPT-violating effects in neutron-antineutron physics,
as a test-bed for dynamical CPT-violations in SM.

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The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
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The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio