Cpt Symmetry and the Antiproton Lifetime
نویسنده
چکیده
The CPT symmetry of relativistic quantum field requires the total lifetimes of particles and antiparticles be equal. Detection of p lifetime shorter than τp ∼ > O(10) yr would signal breakdown of CPT invariance, combined with B–violation. Limits on τp inferred from laboratory and cosmic ray measurements range from months to about one Myr, placing lower limits on CPT–violating scales that depend on the exact mechanism. Paths to CPT breakdown within and outside ordinary quantum mechanics are sketched. Many of the limiting CPT–violating scales in p decay lie within the weak–to–Planck range.
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