First Measurement of Γ(D*+)

28 November 2001

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 87 (25) , 251801
https://doi.org/10.1103/physrevlett.87.251801

Abstract

We present the first measurement of the

D^{* +}

width using 9/fb of

e^{+} e^{-}

data collected near the

ϒ (4 S)

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^{* +} \to D^{0} π^{+}

decay. We find

Γ (D^{* +}) = 96 \pm 4 (stat) \pm 22 (syst) keV

. We also measure the energy release in the decay and compute

Δ m \equiv m_{D^{* +}} {- m}_{D^{0}} = 145.412 \pm 0.002 (stat) \pm 0.012 (syst) MeV / c^{2}

Keywords

All Related Versions

Version 1, 2001-08-07, ArXiv

This publication has 7 references indexed in Scilit:

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