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#Mon Aug 09 11:59:44 CEST 2010
Text__xquHgKOcEd-WfYQ0GneCwQ_text=The picture shows a decay chain of elementary particles. First a pion decays into a muon, the electron\u2019s heavier partner. After a short distance the muon decays further to become an electron. From this we can conclude that the muon has a lifetime of a few millionths of a second. This shows what short range muons have when they move far below the speed of light. 
Text__xquHgKOcEd-WfYQ0GneCwQ_title=Bubble Chamber Photograph of π-μ-e Decay