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

A. Anastassov, E. Eckhart, K. K. Gan, C. Gwon, T. Hart, K. Honscheid, D. Hufnagel, H. Kagan, R. Kass, T. K. Pedlar, J. B. Thayer, E. Von Toerne, M. M. Zoeller, S. J. Richichi, H. Severini, P. Skubic, A. Undrus, V. Savinov, S. Chen, J. W. HinsonJ. Lee, D. H. Miller, E. I. Shibata, I. P.J. Shipsey, V. Pavlunin, D. Cronin-Hennessy, A. L. Lyon, W. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, Y. Maravin, I. Narsky, R. Stroynowski, J. Ye, T. Wlodek, M. Artuso, K. Benslama, C. Boulahouache, K. Bukin, E. Dambasuren, G. Majumder, R. Mountain, T. Skwarnicki, S. Stone, J. C. Wang, A. Wolf, S. Kopp, Y. Kubota, R. Poling, CLEO Collaboration

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176 Scopus citations

Abstract

We present the first measurement of the D*+ width using 9/fb of e+e- data collected near the γ(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 Δm≡mD*+ +-mD0= 145.412±0.002 (statistical) ±0.012 (systematic) MeV/c2.

Original languageEnglish (US)
Article number032003
JournalPhysical Review D
Volume65
Issue number3
DOIs
StatePublished - 2002

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