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Phys. Rev. D 65, 032003 (2002) [11 pages]

First measurement of Γ(D*+) and precision measurement of mD*+-mD0

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A. Anastassov et al. (CLEO Collaboration)
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Received 8 August 2001; published 10 January 2002

We present the first measurement of the D*+ width using 9/fb of e+e- data collected near the Υ(4S) resonance by the CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction method that takes advantage of the small vertical size of the CESR beam spot to measure the energy release distribution from the D*+D0π+ decay. We find Γ(D*+)=96±4(statistical)±22(systematic)keV. We also measure the energy release in the decay and compute ΔmmD*+-mD0=145.412±0.002(statistical)±0.012(systematic)MeV/c2.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.032003
DOI:
10.1103/PhysRevD.65.032003
PACS:
14.40.Lb, 13.25.Ft