Test of CPT Symmetry and Quantum Mechanics with Experimental data from CPLEAR

Abstract

We use fits to recent published CPLEAR data on neutral kaon decays to ${\pi }^{+}{\pi }^{-}$ and $\pi e\nu$ to constrain the CPT--violation parameters appearing in a formulation of the neutral kaon system as an open quantum-mechanical system. The obtained upper limits of the CPT--violation parameters are approaching the range suggested by certain ideas concerning quantum gravity.

9 pages of uuencoded postscript (includes 3 figures)

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• As time goes by

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