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First measurement of Gamma(D*(+))
Ammar, Raymond G. Bean, Alice Besson, David Zeke Zhao, X.
Ammar, Raymond G.
Bean, Alice
Besson, David Zeke
Zhao, X.
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Abstract
We present the first measurement of the D*+ width using 9/fb of e(+)e(-) data collected near the Y(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 Cornell Electron-positron Storage Ring beam spot to measure the energy release distribution from the D*+-->D(o)pi (+) decay. We find Gamma (D*+) = 96 +/- 4 (stat) +/-22 (syst) keV. We also measure the energy release in the decay and compute Deltam = m(D*+) - m(Do) 145.412 +/- 0.002 (stat) +/- 0.012 (syst) MeV/c(2).
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2001-12
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AMERICAN PHYSICAL SOC
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e251801.pdf
Adobe PDF, 124.49 KB
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Ahmed, S, Alam, MS, et al. First measurement of Gamma(D*(+)). PHYSICAL REVIEW LETTERS. December 2001. 87(25)