CPT and Superstring

Ellis, John; Mavromatos, N. E.; Nanopoulos, D. V.

CPT and Superstring

Authors

Ellis, John

Mavromatos, N. E.

Nanopoulos, D. V.

Description

We discuss the possibility that CPT violation may appear as a consequence of microscopic decoherence due to quantum-gravity effects, that we describe using a density-matrix formalism motivated by our studies of non-critical string theory. The maximum possible order of magnitude of such decohering CPT-violating effects is not far from the sensitivity of present experiments on the neutral kaon system, and we review a simple parametrization for them. We also review a recent data analysis carried out together with the CPLEAR collaboration, which bounds any such decohering CPT-violating parameters to be $\lappeq 10^{-19}$ GeV.
15 pages, LaTeX, 4 figures (included)