CP violation and modular symmetries
Abstract
We reconsider the origin of CP violation in fundamental theory. Existing string models of spontaneous CP violation make ambiguous predictions, due to the arbitrariness of CP transformation and the apparent noninvariance of the results under duality. We find a modularCP invariance condition, applicable to any predictive model of spontaneous CP violation, which circumvents these problems; it strongly constrains CP violation by heterotic string moduli. The dilaton is also evaluated as a source of CP violation, but is likely experimentally excluded. We consider the prospects for explaining CP violation in strongly coupled strings and brane worlds.
- Publication:
-
Physical Review D
- Pub Date:
- September 2001
- DOI:
- 10.1103/PhysRevD.64.056005
- arXiv:
- arXiv:hep-ph/0105285
- Bibcode:
- 2001PhRvD..64e6005D
- Keywords:
-
- 11.30.Er;
- 11.10.Kk;
- 11.25.Mj;
- Charge conjugation parity time reversal and other discrete symmetries;
- Field theories in dimensions other than four;
- Compactification and four-dimensional models;
- High Energy Physics - Phenomenology;
- High Energy Physics - Theory
- E-Print:
- 6 pages, REVTeX 4b5+amssymb. 2 references added, substantially the same as published version