Abstract
We performed a precision measurement of the positive muon lifetime at the RIKEN‐RAL muon facility. A strong pulsed‐muon beam was for the first time used to improve a data accumulation rate of the muon decay events. The most dominant systematic error in the present experiment was a count‐loss effect caused by pile‐up signals in a high rate data acquisition. To reduce this effect muon decay positrons were observed by using a multi‐segmented detectors and residual count‐loss events are corrected numerically in the off‐line analysis. We obtain a preliminary result of the muon lifetime by this novel method. Further analysis is in progress.
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