First Measurement of the D*+ Width

2001/05/14 by CLEO Collaboration, M.S. Dubrovin, Mikhail Dubrovin +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0105030

6 pages, 5 figures, submitted to Moriond QCD 2001

arxiv created 2001/05/14 · arxiv updated 2009/11/30

Abstract

We have made the first measurement of the D*+ width using 9/fb of e+e- data collected near the Y4S 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. Our preliminary result is Gamma(D*+) = 96 +- 4 (Statistical) +- 22 (Systematic) keV.

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