Eur. Phys. J. C (2018) 78: 480
https://doi.org/10.1140/epjc/s10052-018-5972-0
https://doi.org/10.1140/epjc/s10052-018-5972-0
Letter
On the strong-CP problem and its axion solution in torsionful theories
Arnold Sommerfeld Center, Ludwig-Maximilians-Universität München, Theresienstraße 37, 80333, Munich, Germany
* e-mail: georgios.karananas@physik.uni-muenchen.de
Received:
23
May
2018
Accepted:
4
June
2018
Published online:
11
June
2018
Gravitational effects may interfere with the axion solution to the strong-CP problem. We point out that gravity can potentially provide a protection mechanism against itself, in the form of an additional axion-like field associated with torsion.
© The Author(s), 2018
