A new measurement of the lifetime of the positive pion Eckhause, M. ; Harris, R. J., Jr. ; Shuler, W. B. ; Siegel, R. T. ; Welsh, R. E. Abstract Publication: Physics Letters Pub Date: November 1965 DOI: 10.1016/0031-9163(65)91016-4 Bibcode: 1965PhL....19..348E