2001/02/05 by T. E. Coan, CLEO Collaboration, Coan, T. E.
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/0102007
24 pages postscript, also available through http://w4.lns.cornell.edu/public/CONF, Submitted to the Fourth International Conference on B Physics and CP Violation (BCP4), Ise-Shima, JAPAN
arxiv created 2001/02/05 · arxiv updated 2009/11/30
We have made 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. Our preliminary result is Gamma(D*+) = 96 +- 4 (Statistical) +- 22 (Systematic) keV.