학술논문
Measurement of the $B^0$ lifetime with partially reconstructed $B^0 \to D^{*-}l^+\nu_l$ decays
Document Type
Electronic Resource
Author
Source
Physical Review Letters
Subject
Language
Abstract
The B0 lifetime has been measured with a sample of 23 million BBbar pairs collected by the BaBar detector at the PEP-II e+e- storage ring during 1999 and 2000. Events from the semileptonic decay B0 --> D*- l+ nu have been selected with a partial reconstruction method in which only the charged lepton and the slow pion from the D*- --> D0bar pi- decay are reconstructed. The result is tau_B0 = 1.529+/-0.012 (stat) +/- 0.029 (syst) ps.