First Measurement of Gamma(D*+) and Precision Measurement of m_D*+ - m_D0

Abstract

We present the first measurement of the D*+ width using 9/fb of e+ e- data collected near the Upsilon(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*+ -> D0 pi+ decay. We find Gamma(D*+) = 96 +- 4 (Statistical) +- 22 (Systematic) keV. We also measure the energy release in the decay and compute Delta m = m(D*+) - m(D0) = 145.412 +- 0.002 (Statistical) +- 0.012 (Systematic) MeV/c^2

24 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, submitted to PRD

References in corpus (4)

• Excited Heavy-Light Systems and Hadronic Transitions
• Search for D0-D0B Mixing
• Radiative Transitions in Heavy Mesons in a Relativistic Quark Model
• Pion Decay Widths of D mesons

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