Stopped Muon Decay Lifetime Shifts due to Condensed Matter
Abstract
Up to second order in alpha, vacuum electro-magnetic corrections to weak interaction induced charged particle lifetimes have been previously studied. In the laboratory, stopped muon lifetimes are measured in a condensed matter medium whose radiation impedance differs from that of the vacuum. The resulting condensed matter corrections to first order in α dominate those vacuum radiative corrections (two photon loops) which are second order in alpha.
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