The APEX Experiment at Fermilab

IS ANTIMATTER STABLE? The APEX experiment searches for the decay of antiprotons at the Fermilab Antiproton Accumulator. Observation of antiproton decay would indicate a violation of the CPT theorem, which is one of the most fundamental theorems of modern physics. The best laboratory limits on antiproton decay come from the APEX experiment which achieved a sensitivity to antiproton lifetimes up to of order 700,000 years for the most sensitive decay modes. Antiproton lifetimes in this range could arise from CPT violation at the Planck scale.
The APEX picture gallery
Physics Results
Conference Reports

Test Experiment Results: S. Geer et al. (T861 Collab.), Phys.Rev.Lett. 72, 1596, (1994).
APEX detector: T. Armstrong et al. (APEX Collab.), FERMILAB-PUB-97/379-E, Nucl.Instrum.Meth.A411:210-222,1998
APEX limits on muonic modes: M. Hu et al. (APEX Collab.), hep-ex/9807025, Phys.Rev. D58, 111101, (1998).
APEX limits on electronic and muonic modes: S. Geer et al. (APEX Collab.), hep-ex/9908036, Phys.Rev. D62, 052004, (2000).
APEX limits on CPT violation: S. Geer et al. (APEX Collab.), hep-ex/9910013, Phys.Rev.Lett. 84, 590, (2000), Erratum Phys.Rev.Lett. 85, 3546, (2000).
Cosmic Ray Limits on the Antiproton Lifetime: S. Geer and D. Kennedy, astro-ph/9812025, ApJ 532, 648 (2000)

Fermilab Joint Experimental/Theoretical Seminar Nov 12 1999: W. Wester

This page was last updated on Apr 15, 2002.
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